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This Just In
Apr 22, 2014 02:20 PM ET // Becky Oskin, LiveScience
More than 40 years after the first Earth Day, many riddles still remain when it comes to our planet.
Apr 22, 2014 01:00 PM ET // Paul Gabrielsen
Tidal power can do what wind and solar can’t: provide reliable energy, right when you need it.
Apr 22, 2014 10:50 AM ET // Larry O'Hanlon
A quarter of a billion years ago Africa slammed into North America and left a scar that can be seen today with special instruments.
Apr 22, 2014 08:02 AM ET // Tim Wall
Intense heat during meteor impacts forged tiny bits of glass that trapped fragments of ancient plant life in Argentina. Could the same process have entombed signs of life on Mars? Continue reading →
Apr 22, 2014 08:00 AM ET // Discovery News
To kick off Earth Day, check out a snapshot of remarkable moments from around the world.
Apr 22, 2014 07:39 AM ET // Paul Gabrielsen
Chilly interruptions of spring revelry may someday disappear as the planet warms. Continue reading →
Apr 22, 2014 07:20 AM ET // Talal Al-Khatib
A careless teenager and a little urine was enough for Portland to flush 38 million gallons of otherwise clean water.
Apr 22, 2014 06:00 AM ET // Tim Wall
For Earth Day, gardeners can order open-source seeds to help ensure vegetable, fruit and grain seeds are available to everyone.
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