Why do we cry?

From blood transfusions to enzyme boosters, our friends at Science Vs dive into the latest research on the search for the fountain of youth. For show transcripts, go to vox.com/unxtranscripts For more, go to vox.com/unexplainable And please email us! [email protected] We read every email. Support Unexplainable by making a financial contribution to Vox: vox.com/givepodcasts Please take a second to help us learn more about you! vox.com/podcastsurvey Learn more about your ad choices. Visit podcastchoices.com/adchoices

A snake. A ray. A shark. They each got pregnant with no male involved. In fact, scientists are finding more and more species that can reproduce on their own. What’s going on? For show transcripts, go to vox.com/unxtranscripts For more, go to vox.com/unexplainable And please email us! [email protected] We read every email. Support Unexplainable by making a financial contribution to Vox: vox.com/givepodcasts Please take a second to help us learn more about you! vox.com/podcastsurvey Learn more about your ad choices. Visit podcastchoices.com/adchoices

Itch used to be understood as a mild form of pain, but scientists are learning this sense is more than just skin deep. How deep does it go? For show transcripts, go to vox.com/unxtranscripts For more, go to vox.com/unexplainable And please email us! [email protected] We read every email. Support Unexplainable by making a financial contribution to Vox: vox.com/givepodcasts Please take a second to help us learn more about you! vox.com/podcastsurvey Learn more about your ad choices. Visit podcastchoices.com/adchoices

Life as we know it needs water, but scientists can’t figure out where Earth’s water came from. Answering that question is just one piece of an even bigger mystery: “Why are we here?” (Updated from 2023) For show transcripts, go to vox.com/unxtranscripts For more, go to vox.com/unexplainable Vox is also currently running a series called Home Planet, which is all about celebrating Earth in the face of climate change: vox.com/homeplanet And please email us! [email protected] We read every email. Support Unexplainable by making a financial contribution to Vox: vox.com/givepodcasts Please take a second to help us learn more about you! vox.com/podcastsurvey Learn more about your ad choices. Visit podcastchoices.com/adchoices

A cell is alive. So is a leaf and so is a tree. But what about the forest they’re a part of? Is that forest alive? And what about the planet that forest grows on? Is Earth alive? Science writer Ferris Jabr says: Yes. For show transcripts, go to bit.ly/unx-transcripts For more, go to http://vox.com/unexplainable Vox is also currently running a series called Home Planet, which is all about celebrating Earth in the face of climate change: http://vox.com/homeplanet And please email us! [email protected] We read every email. Support Unexplainable by making a financial contribution to Vox: bit.ly/givepodcasts Please take a second to help us learn more about you! vox.com/podcastsurvey Learn more about your ad choices. Visit podcastchoices.com/adchoices

The researcher who popularized the idea of the alpha wolf has spent decades trying to take it back. Our friends over at Pablo Torre Finds Out try to uncover how science got it wrong. For more, go to http://vox.com/unexplainable It’s a great place to view show transcripts and read more about the topics on our show. Also, email us! [email protected] We read every email. Support Unexplainable by making a financial contribution to Vox: bit.ly/givepodcasts Please take a second to help us learn more about you! vox.com/podcastsurvey Learn more about your ad choices. Visit podcastchoices.com/adchoices

Solar storms can wreak havoc on power grids, satellites, even astronauts — but scientists still struggle to predict them. One possible way forward? Chasing eclipses. For more, go to http://vox.com/unexplainable It’s a great place to view show transcripts and read more about the topics on our show. Also, email us! [email protected] We read every email. Support Unexplainable by making a financial contribution to Vox! bit.ly/givepodcasts Learn more about your ad choices. Visit podcastchoices.com/adchoices

Think about the thing you’ve practiced more than anything else in the world. Maybe it’s painting. Or writing. Or playing the piano. Now imagine you wake up one day and you just can’t do it. You’re not sick. You’re not injured. But that one thing is impossible. It’s called the yips, and even the most talented people in the world experience it. What could cause them to lose their superpowers? And is there anything they can do to get them back? For more, go to http://vox.com/unexplainable It’s a great place to view show transcripts and read more about the topics on our show. Also, email us! [email protected] We read every email. Support Unexplainable by making a financial contribution to Vox! bit.ly/givepodcasts Learn more about your ad choices. Visit podcastchoices.com/adchoices

Diagnosing diseases such as endometriosis can require difficult steps, like surgery. But researchers are hoping to use menstrual fluid to make detecting the condition much easier. For more, go to http://vox.com/unexplainable It’s a great place to view show transcripts and read more about the topics on our show. Also, email us! [email protected] We read every email. Support Unexplainable by making a financial contribution to Vox! bit.ly/givepodcasts Learn more about your ad choices. Visit podcastchoices.com/adchoices

Periods and menstrual fluid have long been overlooked by scientists. Now, researchers are starting to suspect they might be sources of medical treasure. For more, go to http://vox.com/unexplainable It’s a great place to view show transcripts and read more about the topics on our show. Also, email us! [email protected] We read every email. Learn more about your ad choices. Visit podcastchoices.com/adchoices