In today’s Discovery: What happens to your body when you’re in love? Plus, how an intact tomb revealed secrets of an ancient people in Peru, and how an asteroid may have turned ancient Earth into a snowball.

But first: What surprising discovery did these spelunkers make?

ALBERTO MORANTE/EFE

In 1968, just a few miles from some of the world’s most famous Paleolithic cave art, a group of Spanish cavers was out spelunking. Then, one of them wandered a little farther than the rest of the group and found something astonishing. 

More discoveries:
— This bone may be earliest evidence of cannibalism by our human ancestors
— See photos from inside one of the deepest caves on Earth

PHOTOGRAPH COURTESY DENIS GLIKSMAN, INRAP

PHOTOGRAPH BY JUSTIN JIN

Tea is the world’s most popular beverage after water, with people drinking an estimated 45 billion gallons of it globally every year. Even with different varieties like green and oolong, only one is inextricably tied to this place—and is one of the world’s most luxurious teas.

More discoveries:
— How different types of tea impact your body and mind
— The story behind bubble tea, Taiwan’s iconic drink

BEFORE YOU GO: What’s in the world’s oldest cheese? These mummies have the answer.

Today’s newsletter was edited and curated by Jennifer Baik and produced by Amanda Williams-Bryant. Did someone forward this to you? Sign up for our other newsletters here.