Being King isn't all it's cracked up to be. Learn about the "royal disease" that haunts the descendants of Queen Victoria.
Have humans evolved to be at risk for diseases like cancer?
Where do apples come from? Simple question, right? A seed is planted, the seed grows into a tree, and the tree makes apples. Where do seedless grapes come from?
After all, for the basic body plan to change, not only do you need a random genetic mutation that results in a sixth finger, but that mutation must also provide an evolutionary advantage when it comes to reproduction.