Astrophysicist and folklorist Moiya McTier rejoins the show to talk about how there are too many galaxies out there. Plus, Sara Kiley talks about sharks of yore and Rachel explains how ants are becoming little mini surgeons. The Weirdest Thing I Learned This Week is a podcast by Popular Science. Share your weirdest facts and stories with us in our Facebook group or tweet at us! Click here to learn more about all of our stories!  Links to Rachel's TikTok, Newsletter, Merch Store and More: https://linktr.ee/RachelFeltman  Rachel now has a Patreon, too! Follow her for exclusive bonus content: https://www.patreon.com/RachelFeltman Link to Jess' Twitch: https://www.twitch.tv/jesscapricorn -- Follow our team on Twitter Rachel Feltman: www.twitter.com/RachelFeltman Produced by Jess Boddy: www.twitter.com/JessicaBoddy Popular Science: www.twitter.com/PopSci Theme music by Billy Cadden: https://open.spotify.com/artist/6LqT4DCuAXlBzX8XlNy4Wq?si=5VF2r2XiQoGepRsMTBsDAQ Thanks to our Sponsors! This episode is sponsored by BetterHelp. Get 10% off your first month at https://BetterHelp.com/WEIRDEST Get 20% OFF @honeylove by going to https://honeylove.com/WEIRDEST! #honeylovepod Make switching seasons a breeze with Quince's high-quality closet essentials. Go to https://Quince.com/weirdest for free shipping on your order and 365-day returns. Learn more about your ad choices. Visit podcastchoices.com/adchoices