You might know already that our planet hasn’t always been separated into seven continents. Once upon a time, it was all one huge supercontinent called Pangea. But the movement didn’t stop, so in the future, we might just be a couple continents short?

In 1755, there was a huge earthquake in Lisbon, Portugal that had catastrophic consequences. After that, everything went quiet, and for more than 200 years no more natural disasters happened. But then, in 1969, another earthquake shook the west of Portugal — this one milder, but it was still considered very powerful. It was then that marine geologist João Duarte started looking at the tectonic plates beneath Portugal. He was concerned with those earthquakes for a single reason: they were not normal... Learn more about your ad choices. Visit megaphone.fm/adchoices