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 ...

For years, the appendix carried a reputation as the body’s most pointless organ. Doctors often removed it without hesitation, and textbooks labeled it a vestigial structure—something our ancestors ...

For skeptics of evolution, vestigial organs are pretty difficult to explain. The human body has inherited numerous adaptations from our ancient ancestors that no longer serve a purpose in our modern ...