crisscrossing Science: Recent Episodes
Michael Crosser & Chad Tillberg
Welcome to crisscrossing Science, the podcast in which we answer the science questions that you never thought to ask. Every other week, co-hosts Michael Crosser and Chad Tillberg will share their love of natural science by discussing a topic that they find interesting.
Mike and Chad discuss the mechanics of how birds fly. What is it about their wings, feathers, mass, and speed that makes flight possible?
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We are replaying our interview with Nobel Laureate Bill Phillips, to talk about really cold stuff.
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Chad and Mike discuss the mechanisms behind sodium channels in nerve cells. These proteins open and close based on voltage differences in the cells.
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Mike and Chad discuss what is fact and fiction regarding an electromagnetic pulse (EMP). Hint: there's a lot of fiction in fiction.
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Chad and Mike discuss some of the diseases that can be contracted by being bitten by a tick. The most recent disease is something known as the Alpha Gal Syndrome, which is really an allergic reaction to mammalian meat products. It's an interesting discussion that may make you want to stay inside.
If you do want to go outside, download crisscrossing Science from wherever you find your favorite podcasts and take us with you!
Mike and Chad talk about the recent Artemis II mission as well as the history of exploring the moon. Finally, we explore why we're planning to go back now.
If you have topics that you would like to hear us discuss, email us at crisscrossingsci@gmail.com
Mike and Chad are revisiting this episode from 2022 about Dark Energy. What is it and where does it come from? Astrophysicists are still trying to understand the answers to these questions.
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Chad tells Mike about the dangers of diving in deep water, from nitrogen narcosis to the bends. Given these problems, we then discuss how some mammals have adapted to be able to swim to the bottom of the ocean.
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We had this conversation with Dr. Jo Handelsman in 2023 about farming practices and how to save our soils from erosion. It's something that I've thought about off and on periodically ever since.
If you have topics or ideas for interesting discussions, email us at crisscrossingsci@gmail.com
Mike and Chad invite meteorologist Chris McGinness into the studio to talk about how he can predict the weather and to define some terms that seem new to us.
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Mike and Chad invite Norman Birge, Professor of Physics at Michigan State University, and PhD advisor to Mike, to discuss some research into developing computers that use superconducting materials. Superconducting computers would create less heat, which would be helpful for large data centers.
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Chad and Mike relisten to this classic episode in which Stephen McCormick tells us about the life cycle of salmon. Salmon start their lives in fresh water then move to the ocean and only return to fresh water again to spawn. But many physiological changes have to occur for each of these steps.
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Mike and Chad discuss volcanoes. How do they form, and are they only Earthly events?
If you have topics you would like us to discuss in future episodes, email us at crisscrossingsci@gmail.com
Chad tells Mike about how bacteria can detect when there are enough of them around so that they can change their behavior. It's a collective action that seems smart, but is just a matter of responding to the environment.
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Chad and Mike are learning more about what have been described as "Flying Puppies" by re-playing this episode with Leah Rensel.
Mike and Chad finally talk about Mike's research in the material called graphene. Graphene is a two dimensional conductor that can be used as a biosensor and many other interesting applications.
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In a particularly bloody episode, Chad and Mike discuss the A, B, and O blood types, as well as the Rh positive and negative. What do these designations mean? And what are some of the health consequences of these differences?
This episode came about because of a listener question. If you have questions, email us at crisscrossingsci@gmail.com
Mike and Chad discuss the first three Nobel award announcements for 2025. We review the science behind the medicine, physics, and chemistry prizes that will be awarded in Stockholm later this year.
If you have ideas for future episodes, or just questions that make you curious, email us at crisscrossingsci@gmail.com and we will try to answer your questions in a future episode.
Mike and Chad discuss new findings by the James Webb Space Telescope about blackholes formed at the beginning of the universe, before there were even stars.
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Mike and Chad are revisiting this episode about the physics of baseball. So grab some peanuts and crackerjacks, and enjoy this classic episode.
If you have science questions that you have always wondered about, email us at crisscrossingsci@gmail.com
Chad and Mike discuss carnivorous plants, such as the Venus fly trap. They are surprisingly common and many species independently developed the tools needed to consume flies.
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Mike and Chad are on vacation, but still have the moon to keep us together. So enjoy this episode from the vault about where the moon came from.
Mike and Chad invite Kevin Curry back in the studios to talk about movies and the best Science in Science Fiction for the Third Annual Crisspies. This year, we are talking about time travel, which is tricky because time travel is already science fiction. But, we narrowed down the list to the top five contenders and debated which movies should come out on top.
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Mike and Chad discuss some of the ongoing space missions currently in operation by NASA as well as the European Space Agency, and space agencies from India and Japan. There is a lot of research taking place that deserves recognition.
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In celebration of the latest Jurassic Park movie, we are reposting an episode from 2022 about how the birds escaped Jurassic Park. Enjoy.
This episode came from a listener question. To ask questions for yourself, email us at crisscrossingsci@gmail.com or DM us on social media platforms.
Chad and Mike talk about how biological molecules are often left handed or right handed. This affects us in many fascinating ways.
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Mike and Chad are re-listening to this episode from 2020 about the married couple of Marie and Pierre Curie, each of whom won at least one Nobel Prize and were an amazing scientific power couple.
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Chad and Mike invite Dr. David Lewis, a member of the Confederated Tribes of Grand Ronde and an anthropologist from Oregon State University, onto the podcast. David talks with us about what this land looked like and how land was managed for thousands of years.
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Mike and Chad are re-sharing this episode with Stephen Tufte, a physics professor from Lewis and Clark. He shared with us the science behind playing the mandolin and what makes it different from a guitar.
Chad and Mike discuss the ancestral plight of turtles and how strange a journey it was for sea creatures to come onto land, then return to the water, and (in the case of the tortoise) return back to land.
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Mike and Chad discuss angular momentum and some of the seemingly counterintuitive predictions that come from it. Yet so many things in our daily lives rely on this concept.
Chad and Mike invite Nobel Laureate Dr. Randy Schekman to discuss his research into yeast cells and the mechanisms that yeast (and human) cells use to direct traffic. Proteins that are created within the cell need to be pushed into the appropriate places and Schekman is one of the discoverers of those mechanisms.
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Chad and Mike are preparing for our next episode in which we talk to Nobel Laureate Randy Schekman. He won the award for learning the mechanisms for how proteins within the cells are moved to where they need to go. The process can be very complicated, so we are doing a pre-episode to help us understand more.
So be sure to listen to both this episode and the next one with our special guest.
Mike and Chad celebrate Einstein's 146th birthday by discussing his Greatest Blunder.
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Chad tells Mike all about moss, and the entire ecosystem that lives in that tiny, fluffy, world.
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Mike and Chad discuss milk. Why do mammals drink it? How do mammals produce it? What is pasteurization? Answers to these questions, and more, when you listen to crisscrossing Science!
Mike and Chad invite astronomer Dr. Kathryn Devine to discuss the process of astronomy and how we can determine how stars form.
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Chad and Mike invite Dr. Jay Mellies to talk about his research into bacteria that are able to break down plastics into their constituent pieces.
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Mike and Chad discuss the bright events called supernova and the chain of events that makes them happen.
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Mike and Chad discuss how plastic is created and why it is so ubiquitous in our modern world. We also consider why plastics are often not recycled and why it will be hard to stop making more.
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Chad tells Mike about the co-discoverers of the mechanism of evolution by natural selection: Wallace and Darwin. What? You've only ever heard of Darwin? Listen and learn...
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Chad and Mike welcome Stephen Frost onto the podcast to discuss the evolutionary history of primates.
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Imagine studying one problem for forty years until finally the scientific community accepts your research. Mike and Chad discuss the work of Raymond Davis, Jr. who measured the number of neutrinos emitted by the sun. His numbers did not agree with theory and it took decades to prove that new physics was involved.
Chad and Mike delve into disease and vaccinations and consider the role of B cells. When are new B cells produced and when do older ones ramp up production of antibodies?
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Mike and Chad talk about the differences between AC and DC power. We then delve into the history of electrifying the world, when advocates for AC (Tesla, Westinghouse) beat out arguments for DC (Edison). It is a crazy story.
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How do Homing Pigeons find their way? It turns out researchers have done many experiments to confuse them! We also have a tie in to Game of Thrones, so be sure to tune in.
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We've been busy watching the Olympics, which got us thinking about GOLD!! So while we finish our efforts for Season 8, we are replaying this episode about where gold comes from.
Mike and Chad are gearing up for Season 8 and have a lot of ideas for upcoming episodes. In the meantime, we were enjoying hummingbirds flying around and thought it would be fun to revisit an episode from 2021 about these little guys that migrate surprisingly far distances. Enjoy.
Enjoy this encore episode in which our guest Janet Peterson discusses how much water we should be drinking.
This is our second annual Crisspies award show, celebrating the Best Science in Science Fiction.
The awards this year go to the best depiction of the Science behind pandemics (too soon?). Which movie will win this year?
Chad and Mike invite Adam Dolezal to discuss the plight of bees and how they are facing new struggles with parasites, pathogens, pesticides, and poor nutrition.
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You may have been wondering about the aurora that have been visible in the last few weeks. Mike tells Chad about sunspots and how these lead to the cool events in our atmosphere.
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Mike and Chad take a tour through magnetism and explain how magnets are used in everyday life.
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Chad and Mike talk about plant formations called Galls in which an external object (insect, bacteria, etc) cause the plant to make small circular scars on its leaves.
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Chad and Mike are celebrating 200 episodes of crisscrossing Science! Join us as we look back on the past and remember our favorite episodes.
Mike and Chad answer a listener's question about why spin affects the flight of baseballs.
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Chad tells Mike all about termites, the Russian nesting dolls of the insect world. Termites can't actually digest wood all by themselves and so utilize trichonympha to help them digest. Meanwhile, trichonympha themselves utilize smaller bacteria to help them digest wood.
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Mike and Chad answer all your questions about the total solar eclipse happening on April 8, 2024.
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Chad tells Mike about the new vaccine to prevent malaria. This has been decades in the making and Chad explains why this was such a difficult vaccine to create.
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We often think of astronomical events as ephemeral; however, today we are talking about three evanescent events that are making astronomers very excited. Pulsars, gamma ray bursts, and fast radio bursts are all at the forefront of science. So listen and learn more.
This summer, two different broods of cicadas will be coming of the ground to breed. One brood only mates every 13 years, the other every 17 years. And both cycles happen to match in 2024. So, we are replaying an episode from the last time a large brood of cicadas came up.
Chad tells Mike about how viruses were first discovered, explaining why, once and for all, tobacco is good for mankind.
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Chad tells Mike about Keystone Species, the idea that a single creature can have an outsized effect on an area's ecosystem.
Happy New Year! Since 2024 will involve contentious elections in the United States, the mathematics of voting seems like a perfect topic to consider. Professor of Mathematics Chuck Lundon joined us in the studio to discuss this important topic.
As we recharge from a hectic semester, here is an encore presentation of our episode from last year about electric vehicles.
Mike and Chad dig deeper into a heavy topic: Gravity. We have touched on gravity in a few recent episodes and listeners have been falling for more information.
The weather is getting frightful, so it is a perfect time to discuss the tires on our cars. Mike and Chad discuss why we have to re-inflate them in cold weather and why it is safer to drive on properly inflated tires.
If you have topics that you would like us to consider, email us at crisscrossingsci@gmail.com
With Thanksgiving almost upon us, Mike and Chad are replaying a favorite episode about food. It is time to be thankful for new and interesting dishes.
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Mike and Chad talk about black holes and how they seem to be necessary for the development of galaxies. Subscribe to the podcast today for more great topics.
Why does foliage change color in the Fall? Chad answers this question from many different angles, and LEAVES no stone unturned.
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Mike and Chad discuss the historical evidence behind the heliocentric model, that the Earth (and all of the solar system) orbit around the Sun. It's a fun ride.
If there are other science topics that you think you know but realize that you don't know all of the story, email us at crisscrossingsci@gmail.com
Chad and Mike talk about mechanisms of how pockets of the human population could be especially susceptible or resistant to different diseases.
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Mike and Chad discuss the phenomena of hurricanes and why it was strange for a hurricane to recently land in California.
If you have questions for why things happen, contact us at crisscrossingsci@gmail.com
Mike and Chad are off this week, so are replaying a favorite episode about how musical instruments create sound and briefly why musical scales exist the way that they do.
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Chad and Mike discuss ways that different animals parent their young, and how sometimes these behaviors can lead to kidnapping and worse. To listen to all of our content, subscribe to the podcast!
Mike and Chad talk about how the Earth's Moon came to be. Was it captured by the Earth? Flung out from the Earth itself? Or created some other way? Listen to find out.
If you have questions, email us at crisscrossingsci@gmail.com
Mike, Chad, and guest Kevin award the first Crisspies - "The Best Depiction of Science in Science Fiction" for Space Travel. Join us as we debate the pros/cons for Apollo 13, 2001: A Space Odyssey, Gravity, Interstellar, and The Martian.
Chad and Mike discuss the ways in which culture and language can transfer and evolve similarly to genetic information.
Our next episode will involve discussions of science in science fiction. We will discuss the movies 2001: A Space Odyssey, The Martian, Apollo 13, Gravity, and Interstellar. Rewatch these movies and enjoy our next episode with us.
Chad and Mike invite Bruce Carlson to discuss how electric fish produce voltages and can use them to detect their environments.
If you know of shocking science, email us at crisscrossingsci@gmail.com
Two years ago, Giant Asian Hornets were a new, invasive species to the United States. Dubbed Murder Hornets by the media, for how quickly they could kill honeybees, scientists were quick to implement eradication efforts. It has recently been reported that there were no sightings of murder hornets in all of last year. To celebrate, we are replaying an episode about them from 2020.
Mike and Chad discuss a phenomenon that occurs when some atoms are cooled to very low temperatures. To help with the explanation, we have a special visit from Bill Phillips.
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Chad and Mike discuss how sex is determined in mammals and birds. There are some surprising differences between them. Listen to learn more.
Mike and Chad invite Dr. Jo Handelsman from the Wisconsin Institute for Discovery to discuss the dirty secrets of our soil. There is a lot more happening beneath our feet than we normally think about. And we discuss ways to help maintain the levels of soil that we currently have.
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We are joined by data scientist Dr. Kate Lorenzen to talk about the mathematical logic used to debug complicated computer software and what can go wrong when the logic fails.
If you have ideas for episodes, or questions you would like us to answer, email us at crisscrossingsci@gmail.com
Chad and Mike have been leaning into too much physics lately so we are going to relax and relisten to this episode from 2021 about trap jaw ants with Chad's friend, Andrew Suarez.
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Mike and Chad welcome David Wineland, the 2012 Nobel Laureate in Physics into the studio to discuss cold atoms and atomic clocks.
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Mike and Chad welcome Nobel Laureate William Phillips to discuss his research into the "coolest stuff in the universe," meaning that we discuss techniques to make atoms as cold as a mere 10^-10 degrees above absolute zero.
Mike and Chad discuss the newly discovered comet C2022 E3 (ZTF) which can be viewed right now, with a peak brightness on February 1. So learn about comets and try to go out to find this one while you still can.
Mike and Chad discuss some of the recent research being done to create electrical power through fusion. If possible, it would create clean energy without the waste that other energy sources create.
Chad and Mike invite Leah Rensel to talk about bat behavior and ways that scientists are trying to stop the white nose syndrome, which has already killed millions of bats in North America.
Mike and Chad discuss the wonders of water and how its atomic structure gives it all of its properties. Specifically, we answer why is ice slippery? To find the answer, join us on our fun journey into liquid water and ice.
Mike and Chad tackle one of the more difficult analogies regarding quantum mechanics in today's episode. Schrodinger's Cat inside of a box is one of the more well-known quantum analogies but is also one of the least understood. So join us in this wild ride.
If you have questions that you would like us to address, email us at crisscrossingsci@gmail.com
Mike and Chad invite Sarah Coste onto the show to explain the science behind our sense of smell and why it is that COVID is able to affect it so dramatically.
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Chad and Mike discuss ways in which animals can detect electric fields, from sharks to bees to ants.
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Mike and Chad replay this episode from 2018 in which physicist Joelle Murray discusses quantum phenomena because the author of the specific paper we discussed, John Clauser, has just been informed that he will receive the Nobel Prize in Physics this year.
So sit back, and have your mind blown, by Spooky Action at a Distance.
Mike and Chad discuss the science behind batteries: how they work, why potatoes work, and how to make them last longer.
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Chad and Mike invite NOAA scientist Dr. Kim Goetz to discuss how scientists study whale behavior.
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Mike and Chad explain the evidence behind something astronomers call Dark Energy.
If you have questions about the universe, email us at crisscrossingsci@gmail.com
Chad and Mike discuss the invasive Emerald Ash Borer Beetle, how it attacks ash trees, what happens when a tree is infested, and how we can help keep EABs from continuing to spread.
Here is more information about the beetle: https://www.oregon.gov/odf/Documents/forestbenefits/fact-sheet-emerald-ash-borer.pdf
Mike and Chad compare and contrast electric vehicles with traditional internal combustion engines. How do they operate? And how do those differences translate into efficiency, torque, and pollution?
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Chad tells Mike about interesting ways in which mosquito populations might be held in check by using a bacteria called Wobachia.
If you have the itch to ask us a question, email us at crisscrossingsci@gmail.com
Mike and Chad talk about the planetary conditions necessary for life to form. Does this mean we are alone in the universe? Or are aliens all around us?
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Chad tells Mike about the Axolotl, a rare salamander that has given biologists insights into how hormones affect animal development.
This episode is from a listener question, if you want to axolotl questions of us, email us at crisscrossingsci@gmail.com
Mike and Chad discuss the science behind lasers - what makes them special? how to they work? what are they used for?
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Chad and Mike discuss a new discovery of sponge fossils that are about 200 million years older than many expected to find them. But this finding makes two different branches of science finally agree.
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It's baseball season and Mike and Chad have a special episode dedicated to the physics of this great pastime.
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In preparation for Mother's Day, Mike and Chad are replaying an episode from 2019, in which Megan Bestwick discusses Mitochondria with us. Enjoy.
Chad and Mike answer a question from a (future?) listener about birds and dinosaurs, "Why did birds survive and dinosaurs didn't?"
If you have a question that you'd like us to tackle, email us at crisscrossingsci@gmail.com
Mike and Chad speak with Stephen Tufte from Lewis and Clark College about the physics of the mandolin. Why does it have double strings? And why does it have f-holes in the front plate? These and other questions will be answered.
If you have questions that you would like answered, email us at crisscrossingsci@gmail.com
Mike and Chad are on Spring Break, so we thought our listeners would enjoy listening to an episode from January 2021 about how our cells develop tans.
Mike and Chad talk about the new James Webb Space Telescope, which has just begun collecting preliminary data.
If you have ideas for future episodes, email us at crisscrossingsci@gmail.com
Chad and Mike discuss treatments for HIV that have been discovered by studying those rare individuals who are naturally immune to HIV and AIDS.
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Mike and Chad discuss ways in which lasers can be used to cool atoms so that they are basically not moving, which allows for more careful studies of atomic properties.
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Chad and Mike discuss some of the mechanisms and what pressures drive viruses change to create new variants. Comparing this pandemic to the Spanish Flu might give us insight in what to expect going forward.
If you want to know more about COVID, send us an email at crisscrossingsci@gmail.com and we will try to address it in a future episode.
Chad and Mike invite Stephen McCormick, a research fellow at the US Geologic Survey, to discuss how salmon can live in fresh water and transition to salt water. Join us in the briny depths to learn more about salmon.
Mike and Chad discuss where gold comes from. It really is a gold star episode.
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Mike and Chad invite Janet Peterson back to talk about water. Specifically, how much water should we be drinking? Should we worry about electrolytes? And why can't we drink sea water?
If you want us to answer other interesting questions, email us at crisscrossingsci@gmail.com
Mike and Chad discuss how the frequency of solar flares fluctuates on an eleven year cycle. So join us on an enlightening journey through magnetism and the Sun.
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Chad and Mike discuss the invasive Spotted Lantern Flies and how they pose a danger to wine, beer, and many many (less) important crops.
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Mike and Chad head to the coast, figuratively speaking, to talk about how ocean waves form and why they always seem to change from day to day.
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Chad and Mike discuss another treatment for COVID-19 that has been in the news: monoclonal antibodies. How is this treatment made and what does it do for the body? Listen to find out.
Chad and Mike tackle some of the research discussing the effectiveness of ivermectin for treating COVID-19 and talk about the history of the drug.
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Mike and Chad check in on recent findings by probes on and around Mars. In particular, Insight has provided some interesting results about the layers of the crust, mantle, and core of Mars.
We will have a new season starting in September. Until then, enjoy this previous episode about Slime Mold.
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In this repeat episode, Mike and Chad answer a timely listener question about how to cool off one's house. They then, as is their wont, take a deep dive into thermal dynamics and how air conditioning works.
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Mike and Chad welcome Bill Mackie to discuss why we want to have Free Electrons, which are used as microscopes and surface analysis, as well as production of x-rays and microwaves.
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Chad and Mike answer a listener question about hummingbirds and bird migration.
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Mike and Chad open up the mailbag to answer some listeners' burning questions about what happens during hot weather.
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Mike and Chad discuss NASA's recent announcement of sending two new probes to study Venus. We talk about why Venus is interesting and what these probes plan to do.
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Chad and Mike invite Andrew Suarez to discuss trap jaw ants. These ants have specialized mandibles that are able to snap shut, similar to that of a mouse trap, in order to fight and to flee.
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Mike and Chad talk about the fundamentals of quantum computing and why anybody would want to learn how to make a computer behave as a quantum system.
This episode is dedicated in memory of Don Crosser.
Chad and Mike discuss the Brood X of cicadas that will soon be making noise across much of the Eastern United States. They only come out of the ground to mate once every 17 years, so this is quite the event.