Giant mammals roamed North America during the Ice Age, but were humans among them? A site in Vero Beach on Florida's East coast contains mammoth, mastodon, giant ground sloth—and human fossils. The problem is that humans were not yet supposed to have been there, according to the standard story told to generations of archaeologists.

Solomon Islanders have very dark skin. Most also have dark hair, but about one in ten of them have strikingly blond hair. How is this blond trait inherited, and do the people of the Solomon Islands inherit it the same way that other blond populations do?