Divers discover world's longest underwater cave in Yucatan Peninsula
January 18, 2018, 1:40 p.m. by Mary Jo DiLonardo
Hundreds of archaeological sites exist in this underwater realm.
The first dark sky reserve in the U.S. is a stargazer's paradise
December 29, 2017, 2:23 p.m. by Michael d'Estries
Located in Idaho's Sawtooth Mountains, it's the third largest reserve in the world.
Nature Conservancy establishes 24,000-acre California coastal preserve
December 26, 2017, 6:37 a.m. by Noel Kirkpatrick
This unique swath of land is home to many kinds of animals on both land and sea.
The animal inspirations behind the newest 'Star Wars' creatures
December 21, 2017, 12:44 p.m. by Michael d'Estries
From adorable porgs to crystalline foxes, the otherworld species of 'The Last Jedi' have roots here on Earth.
Oldest fossils ever found confirmed to be 3.5 billion years old
December 20, 2017, 3:20 p.m. by Bryan Nelson
The finding indicates that life on Earth began much earlier than previously thought.
Award-winning Nat Geo images capture magical moments in nature
December 14, 2017, 1:58 p.m. by Mary Jo DiLonardo
From a peeking orangutan to dazzling underwater displays, National Geographic's photo contest offers amazing snapshots.
Cave system in Mexico is filled with creatures that devour methane
December 14, 2017, 9:37 a.m. by Mary Jo DiLonardo
This underwater world in the Yucatan Peninsula is an ecosystem fueled by methane.
One woman met a stray dog — and changed everything for a forgotten breed
Mysterious loud booms are being heard around the world and no one knows why
Parallel worlds exist and interact with our world, say physicists
This sweet-looking kitty is one of Africa's deadliest cats
9 of the world's largest dog breeds
5 unusual ways to keep your house warm