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  Scientists issue dire warning about global warming

Time to wake up: Republicans boycott vote on EPA nominee

We learned that we are about to pass 400 parts per million in the amount of carbon in the atmosphere. That may not mean anything to you it certainly didn't mean anything to me. So here's the context for it. Full story

Sen. Sheldon Whitehouse’s climate change Senate smack down

  As Republicans block President Obama's nominee to head the EPA, Chris Hayes notes that carbon in the atmosphere is about to hit its highest level since the Pliocene Era, three to five million years ago, and Senator Sheldon Whitehouse smacks down a colleague who says God won't allow us to ruin the Ea

How Cirrus Clouds Form — And Why It Matters

Give the upper atmosphere dust, and it will make cirrus clouds. Full story

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Articles

How Plants May Help Offset Global Warming

'Dark Lightning' Sparks Call for More Earth-Gazing Satellites

Bumpier Flights Ahead on Warming Planet, Study Suggests

Giant Alien Planet in Supersized Solar System May Solve Mystery

Cause of Odd Arctic Ozone 'Hole' Found

What If Your Town Were Hit by a Meteor?

Satellite Sees Russian Meteor Explosion from Space

Water Leaking Into Stratosphere Could Harm Ozone

Loads of Microbes Found High in Atmosphere

Astronaut Snaps Beautiful Photo of 'Night-Shining Clouds'

Video

  A call for respect on Cesar Chavez Day

Chico State students rally against racially-tinged party atmosphere that has become common on holiday that honors civil rights and labor leader Cesar Chavez. KNVN's Bryan Callahan reports.

  Meteor flashes in the sky

A meteor put on a spectacular show Friday as it entered the atmosphere on the East Coast. NBC’s Michelle Franzen reports.

  The conclave feels like New Hampshire in January

Father Robert Barron, Monsignor Christopher Nalty, and NBC's Anne Thompson discuss how the atmosphere in Rome feels like a political campaign, why the chances of an American cardinal being chosen has gotten better, and who the front runners are right now.

  The time for choosing sides on climate change is now

Up host Chris Hayes delivers his Story of the Week on what America must do to prepare for future natural disasters.

  Statesmanship in an age of partisan politics

Hawaii House candidate Tulsi Gabbard talks about her hope and optimism about the future of government in America, despite the extremely partisan atmosphere these days.

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Mars and solar wind
Mars and solar wind

An artist's conception shows how Mars' atmosphere was stripped away by charged particles from the sun.

"12-12-12 The Concert For Sandy Relief" Production Load-In
"12-12-12 The Concert For Sandy Relief" Production Load-In

NEW YORK, NY - DECEMBER 11: A general view of atmosphere at "12-12-12 The Concert For Sandy Production" Load-In at Madison Square Garden on December 11, 2012 in New York City.

A combined NASA handout image shows the sun's innermost atmosphere as seen by the Solar Dynamics Observatory
A combined NASA handout image shows the sun's innermost atmosphere as seen by the Solar Dynamics Observatory

A combined NASA handout image shows the sun's innermost atmosphere as seen by the Solar Dynamics Observatory inside a larger image provided by the Solar and Heliospheric Observatory spacecraft taken November 8-9, 2012. A coronal mass ejection can be seen traveling away from the sun in the upper ri

NASA's High Resolution Coronal Imager telescope, or Hi-C, captured this high-resolution shot of the sun's outer atmosphere during a 10-minute suborbital spaceflight on July 11.