Kucka WE

When carrots were first domesticated as a food crop in 10th century Afghanistan, they were largely a rich purple color, with a few yellow carrots among them. Eventually, carrot seeds made their way to Europe. Over time, people figured out that the yellow carrots actually tasted better than the dark purple varieties, which had a bit of a bitter flavor.

Dutch farmers went to work to breed an even tastier carrot, and by the 16th century, they had developed the bold orange carrot we know today.

The longest-living vertebrate animal on the planet is the Greenland shark. At 21 feet long and 2,200 pounds, it's also one of the world's largest predators.

In 2016, when scientists found a method of determining age by examining the proteins in the lens of the sharks' eyes, they realized their specimen lived to be between 300 and 500 years old. Perhaps because they live such a long time, Greenland sharks grow very slowly: only about a centimeter a year. On top of that, they don't reach sexual maturity until they're 150 years old.