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.

The first instar larva, just out of the egg, is solid pale green and translucent. The second instar larva develops a characteristic pattern of white, yellow and black transverse bands, and the ...