When they reach the end of their long evolutions, smaller stars—those up to eight times as massive as our own sun—typically become white dwarfs. These ancient stars are incredibly dense.

Both black and white rhinoceroses are actually gray. They are different not in color but in lip shape. The black rhino has a pointed upper lip, while its white relative has a squared lip.

As the writer behind this guide to the best white sneakers, it’s fascinating to see what the sneakerheads are chasing — from Air Force 1s to Stan Smiths. There’s a style for everyone these ...