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Photos

2014-09-18

    Pulse of Dead Star Powers Intense Gamma Rays
Pulse of Dead Star Powers Intense Gamma Rays

When the most massive stars explode as supernovas, they don’t fade into the night, but sometimes glow ferociously with high-energy gamma rays. What powers ...

2014-09-17

    NASA Air Campaigns Focus on Arctic Climate Impacts
NASA Air Campaigns Focus on Arctic Climate Impacts

NASA researchers are carrying out three Alaska-based airborne research campaigns in the Arctic aimed at measuring greenhouse gas concentrations near Earth’...

2014-09-16

    U.N. Recognizes U.S. Project that Measures Greenhouse Gas
U.N. Recognizes U.S. Project that Measures Greenhouse Gas

A greenhouse gas field measurement research program developed by scientists in the United States is named a “Project to Watch” by a United Nations organiza...

Photo Galleries

2013-07-01

The United Nations: Partner in Peace, Stability, Security

President Obama believes the United Nations can be extraordinarily constructive and an important partner in bringing peace, stability and security to the ...

2013-06-11

Immigration: The Making of the American People

The story of America is largely the story of multiple ethnic groups coming to the country’s shores and blending into diverse yet cohesive societies.

2013-04-02

    Route 66: The Mother Road
Route 66: The Mother Road

Historic Route 66 provides travelers a slice of 20th-century America and its attractions, both authentic and kitschy.