400 years ago, visitors to this painted cave took hallucinogens. People at California’s Pinwheel Cave left evidence of their altered state literally stuffed into its walls—the first physical ...

Archaeologists in Cambridgeshire, U.K., have discovered what may be the best-preserved physical evidence of a crucifixion—a 1,900-year-old skeleton with a two-inch iron nail driven through his heel.

Lepidopteran scales identified in 236-million-year-old coprolites from Argentina provide the oldest physical evidence of butterflies or moths, extending their fossil record by about 40 million years.