Explorers discover massive cave system under Montreal
December 4, 2017, 5:04 p.m. by Mary Jo DiLonardo
The passages are lined with stalagmites and stalactites.
Volunteers help bring life back to Grand Canyon springs
November 13, 2017, 1:30 p.m. by Michael d'Estries
The Grand Canyon Trust is spearheading efforts to restore watering holes critical to desert species.
Everyone wants to help rebuild Columbia River Gorge (but it's not time yet)
September 14, 2017, 7:53 a.m. by Mary Jo DiLonardo
Volunteers are eager to get boots on the ground after wildfires devastated their natural treasure.
'One Big Home' profiles America's obsession with supersized dwellings
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.'
Americans are quietly preserving 56 million acres of private land
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.
Standing Rock protesters celebrate as pipeline is halted
December 5, 2016, 12:15 p.m. by Mary Jo DiLonardo
Activists relish the victory, but many of them still aren't leaving.
The faces at Standing Rock represent many generations
November 23, 2016, 8:10 a.m. by Jaymi Heimbuch
Why people are protesting the Dakota Access Pipeline.
This sweet-looking kitty is one of Africa's deadliest cats
One woman met a stray dog — and changed everything for a forgotten breed
The first image of a black hole is almost ready
What to eat (and avoid) to improve dry skin
Parallel worlds exist and interact with our world, say physicists
What caused 200,000 saigas to die?