Blue aurora, star trails, in Unity, Maine

Awesome auroral display back in July, when the familiar green, magenta and purple colors changed to blue as they spiked.

Bioluminescent tube worm

Scientists at Scripps Institution of Oceanography in San Diego are unraveling the mechanisms behind the dazzling bioluminescent display of this tube worm.

Comet ISON in outburst

The comet will be in a conspicuous place in the sky for the next several mornings, near the bright star Spica on the sky's dome.

Storm season begins in Australia

A spooky night in Ipswich, Australia, by Nathan A. Smith.

Yellowstone’s White Dome Geyser, midnight

White Dome Geyser, in the Lower Geyser Basin of Yellowstone National Park, erupting at midnight, by Zack Clothier.

Comet ISON on November 10, 2013

Comet ISON's two tails are a sign that the comet is drawing closer, and closer, to the sun that binds it in orbit. It'll be closest to the sun on November 28.

Follow your own path

Mike Taylor shot this photo in the Maine woods facing toward a warm autumn sun.

Why Super Typhoon Haiyan was so powerful

Low wind shear and warm ocean temperatures exist in the Pacific now. That's why Haiyan grew into one of the strongest - perhaps the strongest - storm ever recorded.

Bent trees on the shores of Lake Michigan

Ken Scott was hiking at the Sleeping Bear Dunes National Lakeshore, in Michigan, when he came upon these bent trees.

Four comets in one night

"Four comets in one night - an opportunity too rare to be missed." - Zlatan Merakov

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