Dream Chaser is getting tested at NASA

After a journey spanning almost two decades, Sierra Nevada Corporation's Dream Chaser reusable spaceplane, named Tenacity, is officially undergoing environmental testing at NASA's Neil Armstrong Test Facility located at NASA's ...

California's trees are dying, and might not be coming back

The State of California is banking on its forests to help reduce planet-warming carbon dioxide in the atmosphere. But that element of the state's climate-change solution arsenal may be in jeopardy, as new research from the ...

Comet posing beside crescent moon in cool photo op

Now's your chance to see the comet that passed within 100 million miles of Earth last week. Twilight on Tuesday will provide the best photo op for the comet called Pan-STARRS. It will be visible in the Northern Hemisphere ...

California winds shifting as wildfire battles go on

California weather was heating up and winds were shifting Thursday as more than 14,000 firefighters battled wildfires up and down the state, including a major blaze they hoped to keep out of the Lake Tahoe resort region.

Study reveals significant role of dust in mountain ecosystems

Trees growing atop the Bald Mountain Granite in the southern Sierra Nevada rely on nutrients from windblown atmospheric dust—more than 50 percent—compared to nutrients provided from underlying bedrock.

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