re so hardy they can even survive on the outside of spacecraft; and Claire gets her teeth into a new, large longitudinal study that showed water fluoridation did not harm cognition or IQ. Maeng, Chang-hyun et al., Extreme environmental tolerance and space survivability of the moss, Physcomitrium patens. iScience, Volume 0, Issue 0, 113827 (2025). DOI: 10.1016/j.isci.2025.113827 John Robert Warren et al., Childhood fluoride exposure and cognition across the life course. Sci. Adv. 11, eadz0757 (2025). DOI:10.1126/sciadv.adz0757