Wilderness & Resources

'Humongous fungus' fascinates researchers

Why good Christmas trees will be hard to find

The world is running out of sand

'Breathtakingly audacious' project aims to plant 73 million trees in Amazon

5 things to know about Australia's mystical Uluru

Haunting time-lapse reveals how much of the night sky we're missing

Carbon dioxide levels are reaching heights we haven't seen in 800,000 years

How Iceland is regrowing forests destroyed by the Vikings

The scientific trick to healthy happiness

Huge fee increases proposed for most popular U.S. national parks

7 reasons why Arctic sea ice matters

America's 9 most at-risk open urban spaces