Enjoying EarthSky? Subscribe.

214,297 subscribers and counting ...

Image Credit: Volcano Discovery

What is the Ring of Fire?

There are more than 450 active and dormant volcanoes located within the Ring of Fire. Plus it’s prone to powerful earthquakes. Here’s why.

Image Credit: Rob Lavinsky

What’s the birthstone for December?

December has two birthstones, turquoise and zircon.

holiday_nap_cropped

Does eating turkey really make you sleepy?

Many believe that turkey is high in tryptophan, which causes that drowsiness you feel after a big Thanksgiving meal. True?

NASA

Is it true that Jupiter protects Earth?

Jupiter’s gravity slings long-period comets out of harm’s way, while nudging some asteroids closer to Earth. And, in 1770, Jupiter took aim on Earth – but missed.

A supervolcano is classed as more than 500 cubic kilometers of erupted magma volume.

What triggers supervolcano eruptions?

Supervolcanoes – massive eruptions with potential global consequences – don’t appear to follow the conventional volcano mechanics, say researchers.

Arctic Tern in flight via Wikimedia Commons

Which bird migrates the farthest?

Over its lifetime of about 25 years, an Arctic Tern can fly a million kilometers – nearly three times the distance from the Earth to the moon.

Screen Shot 2015-11-03 at 3.42.22 PM

What is El Niño?

A big El Niño is developing in 2015, say scientists. This NASA video explains El Niño and its impact on the marine food web.

Image Credit: Rob Lavinsky

What’s the birthstone for November?

November’s birthstone, the topaz, was thought to have the power to cool boiling water, as well as excessive anger.

Sci fi concept of Dyson sphere  (Source)

What is a Dyson sphere?

What if an advanced civilization could collect all of the energy emitted by its star?

In the cradle of dogkind? Photo credit: Coss and Johanna

Where did the first dogs come from?

New DNA analysis says your pooch’s ancestors were Central Asian wolves