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September 28, 2015. View larger. \  Image credit: NASA
Science Wire | Sep 29, 2015

Wildfires continue to plague US West

A satellite view from Monday shows wildfires still burning in Oregon, Idaho, and Montana. The fires started in August.

Science Wire | Sep 29, 2015

High ‘supermoon tides’ strike coasts

Sunday’s supermoon, combined with an 18.6-year lunar cycle, caused high tides on both sides of the Atlantic this week. There were many flood warnings and alerts in effect in the UK on Tuesday night. In eastern North America, Tropical Storm Joaquin might combine with high tides to cause flooding.

Image Credit: kaet44
Science Wire | Sep 29, 2015

Video: Greenland’s ice melt

Scientists are studying the increasingly fast rate of summertime ice melt in Greenland. See a new NASA video, plus illustrations of the 2015 melt season.

Night falls when you enter Earth's shadow
FAQs | Sep 28, 2015

When can you see Earth’s shadow?

During Sunday night’s total eclipse of the moon, Earth’s shadow brushed the moon’s face. But you can see Earth’s shadow tonight, too, or any clear evening.

This original painting by James Havens of Ugrunaaluk kuukpikensis, the new species of duck-billed dinosaur, illustrates a scene from ancient Alaska during the Cretaceous Period.
Science Wire | Sep 28, 2015

Newly discovered dinosaur roamed northern Alaska

Hadrosaur was a truly polar dinosaur that endured months of winter darkness and probably experienced snow.

A draft of a new "tree of life," a collaborative effort between 11 institutions, via Astrobiology.com.
Science Wire | Sep 21, 2015

New tree of life for 2.3 million species

An initial draft, a collaborative effort from scientists at 11 institutions, of a new, comprehensive evolutionary tree of life. Plus …

Smokey sunset, August , 2015, from EarthSky community member Chris Levitan Photography.
Science Wire | Sep 21, 2015

2015 wildfire season a record-breaker

Worst recorded years for U.S. wildfires are 2005, 2006, 2007, 2011 and 2012. This year has already joined that list, and wildfire season is still going strong.

January 1, 2015 sunset by Helio de Carvalho Vital.  Shot 3 of 6.
Science Wire | Sep 19, 2015

Why aren’t day and night exactly equal at the equinox?

On the day of the equinox, the center of the sun would set about 12 hours after rising – given a level horizon, as at sea, and no atmospheric refraction.

Autumn foliage. Image Credit: Kasia via Flickr.
Science Wire | Sep 18, 2015

Why Earth has 4 seasons

Some assume our planet’s changing distance from the sun causes the change in the seasons. That’s logical, but not the case, for Earth.

Image: Via Fairy Room
Science Wire | Sep 18, 2015

What is a fairy ring?

Have you ever noticed mushrooms growing in a big circle? It’s known as a fairy ring. How does it happen?