Wilderness & Resources

Urban trees are growing — and dying — faster than their rural counterparts

Days after oil spill, Nebraska approves Keystone XL pipeline project

Drilling threat looms large for Arctic National Wildlife Refuge

NASA captures new photos of runaway iceberg, and it's bigger than Delaware

Canada opens first permanent highway to remote Arctic coast

Volunteers help bring life back to Grand Canyon springs

The lost towns under Lake Murray

'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

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