At 66 years old, Wisdom the Laysan albatross hatches another chick

Meet the pangolin, an adorable endangered creature

Do grizzly bears belong in Washington state?

Newly discovered gecko goes nude for safety

Mysterious ancient geoglyphs discovered in Amazon rainforest

Is the Endangered Species Act working?

Earth's tiniest porpoise approaches extinction

10 women who changed the way we see nature

Obama's national monuments are a big deal

Meet 9 species named after Obama

The once hopelessly polluted Anacostia River is making a comeback

Hordes of insects migrate overhead each year