Earth Matters

Grad student discovers world's first known manta ray nursery

Asteroid with a 13-mile-high mountain is now visible to the naked eye

7 fantastic facts about Portuguese man-of-war

The war on plastic is heating up

7 things to know about the summer solstice

These U.S. communities are most vulnerable to sea level rise

Project restores majesty of Yosemite sequoias

New type of photosynthesis pushes the limits

Dramatic video captures 'Tsunami from Heaven'

The wild jaguars of Mexico have some good news to share

What are extratropical cyclones?

Tucson to resurrect river with recycled water