January 18, 2018, 1:40 p.m. by Mary Jo DiLonardo
Hundreds of archaeological sites exist in this underwater realm.
'Breathtakingly audacious' project aims to plant 73 million trees in Amazon
November 1, 2017, 1:02 p.m. by Mary Jo DiLonardo
The project will cover nearly 70,000 acres.
Haunting time-lapse reveals how much of the night sky we're missing
October 31, 2017, 1:12 p.m. by Christian Cotroneo
The view from these ghost towns is scary and stunning.
Carbon dioxide levels are reaching heights we haven't seen in 800,000 years
October 30, 2017, 11:08 a.m. by Noel Kirkpatrick
CO2 concentration in the atmosphere saw a sizable jump between 2015 and 2016.
How Iceland is regrowing forests destroyed by the Vikings
October 27, 2017, 7 a.m. by Russell McLendon
Only about 2 percent of Iceland is now forested, down from as much as 40 percent before Vikings arrived.
Huge fee increases proposed for most popular U.S. national parks
October 25, 2017, 1:42 p.m. by Jenn Savedge
The increased revenue would be used to cover the park system's maintenance backlog.