It was the first day of spring break in 1992 in Phoenix, Ariz. and 12-year-old Heather Smith was excited for her family's upcoming ski trip. But before Smith and her family had even packed their snow ...

The appendix has independently evolved at least 32 times across 361 mammalian species. What makes it an evolutionary darling ...

For more than a century, the human appendix has been written off as a biological relic, a shrunken leftover from plant-eating ...

The human body is still a mystery, and some organs have largely been considered useless in one way or another. However, the ...