A strange pyramid-shaped peak in Peru is shrouded in mystery, mainly because this geographic marvel is so hard to reach.

A recently unearthed altar in Tikal holds the burial of a child and adult, but it wasn't built by the Maya. Instead, it ...

Annie Jump Cannon was an astronomer, suffragist, and photographer. Nearly deaf for much of her life, Cannon is credited with the invention of the Harvard spectral classification system, which assigns ...