April 5, 2017, 11:39 a.m. by Angela Nelson

From huge pink diamonds to glittering topaz to a giant pearl, these massive gemstones have fascinating histories.

March 7, 2017, 7:16 a.m. by Michael d'Estries

Carpenter Thomas Bena goes behind the scenes to explore the growing trend of 'trophy homes' and 'starter castles.'

December 20, 2016, 8:15 a.m. by Russell McLendon

U.S. landowners voluntarily protect more land (and water) than all national parks in the lower 48 states, a new census shows.

December 5, 2016, 12:15 p.m. by Mary Jo DiLonardo

Activists relish the victory, but many of them still aren't leaving.

November 23, 2016, 8:10 a.m. by Jaymi Heimbuch

Why people are protesting the Dakota Access Pipeline.

November 22, 2016, 6:42 a.m. by Starre Vartan

Noise impacts ecosystems in more ways than you might think.

May 2, 2016, 12:48 p.m. by Russell McLendon

Long before modern countries like China and Dubai began making artificial islands, the Calusa people built a kingdom on seashells.

November 13, 2015, 7 a.m. by Russell McLendon

After decades of spirited debate, relations may finally be thawing over a disputed island in the Arctic.

October 2, 2015, 8:05 a.m. by John Donovan

This gorgeous salt plain may be the key to keeping our electronics charged up.

September 16, 2015, 8:30 a.m. by Catie Leary

Canadian photographer's riveting imagery explores the multitude of ways that industry is transforming our planet's natural landscapes.

June 29, 2015, 1:36 p.m. by Jaymi Heimbuch

From the tallest to the most powerful, to even the biggest underwater waterfall, you don't want to miss these natural wonders.

January 21, 2015, 4:22 p.m. by Russell McLendon

The venom of some cone snails contains insulin, a new study finds, helping the sluggish mollusks snag speedier prey.