Religiosity may be undermining sex education in some states.

"Doomsday Preppers," a new show on the National Geographic Channel, profiles people who fear the coming apocalypse. Scholars say this phenomenon is on the rise.

Russian news outlets reporting team has reached long-buried Antarctic lake.

At dusk, Archaboilus musicus sings in a Jurassic forest of Northwest China. The forest grew under humid conditions, probably close to the banks of a river and consisted primarily of conifers and ferns.