8 things to know about the vernal equinox

What do eggs, shamrocks and monuments have to do with the first day of spring?

What gray hair says about your health

Gray hair may indicate more than our biological age: It could signal one of these health…

9 things you don't know about sand dollars

Sand dollars are echinoids that live on the ocean floor. You may enjoy collecting their shells,…

9 things you don't know about sand dollars

Sand dollars are echinoids that live on the ocean floor. You may enjoy collecting their shells,…

Why do screams grab our attention?

Screaming is primal. Whether it’s pain, horror or a baby's cry, a scream demands attention. Why…

12 interesting facts about the lefties we love

Like, why are there so many left-handed athletes, and how come they're so good at math?

Can Africa's Great Green Wall combat climate change and mass migration?

The Great Green Wall is rooted in Africa's Sahel region on the southern border of the…

Sweden's bokbåten is a floating library that brings books to residents of remote islands

Sweden has a floating library — the bokbåten — that brings thousands of books to people…

Why hydrangeas and the Azores are inextricably linked

The Azores archipelago off the coast of Portugal is home to some of the most gorgeous…

Why some cats hate belly rubs

The science behind why some cats hate belly rubs, plus what it means when a cat…