10 women who changed the way we see nature

Obama's national monuments are a big deal

Meet 9 species named after Obama

Earth's tiniest porpoise approaches extinction

The once hopelessly polluted Anacostia River is making a comeback

Hordes of insects migrate overhead each year

Hawaiian crows return from extinction in wild

Unknown 'ghost octopus' found 2.6 miles deep

Americans are quietly preserving 56 million acres of private land

5 languages on the verge of extinction

How tiny wasps could save the Christmas Island red crab from invasive crazy ants

Audubon's Christmas Bird Count takes off Dec. 14