Automobiles did not always rule American streets. But when they took over, things sure got messy.

A grouping of granite blocks along a grassy Amazon hilltop may be the vestiges of a centuries-old astronomical observatory.

New study finds bad habits behind erectile dysfunction.

For millennia, people have gone to great lengths to get pretty things. Take, for example, the newly discovered journeys of early West Indian groups.

A synthetic version of the venom attaches to the cancer cells, then radiation in the potion kills them. More tests are needed, however.

A Common Evening Brown butterfly puts on a near perfect display of cryptic coloration.