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Today in science: Finding magnetic south

On January 16, 1909, a team of Antarctic explorers thought they’d found the magnetic south pole. Then, a few years later, they began to have doubts.

Huge iceberg set to break off Antarctica

An iceberg the size of Delaware is set to calve from Antarctica’s Larsen C ice shelf. Only about 12 miles (19 km) still connect the ice chunk to the rest of the continent.

Weak La Niña follows potent El Niño

A year ago, the equatorial Pacific was pulsing with heat, due to one of the most intense El Niños on record. But the current La Niña has been relatively quiet.

Chickens are intelligent, caring, complex

Think chickens are clueless? Not so, says a new study. Instead, chicken intelligence is underestimated.

New app identifies birds from photos

Snap a pic, and the (free) Merlin Bird Photo ID app will identify the bird. Once downloaded, it can go anywhere bird-watchers go, even places without cell service or Wi-Fi.

Aurora alert! Thanks to huge coronal hole

The hole is gigantic and facing Earth’s way. Possible aurora sightings at the latitude of the northern U.S. – for example, in Michigan or Maine – on January 4 and 5.

Wow! Polar stratospheric clouds

Photos from the EarthSky community of brightly-colored ice clouds in Earth’s stratosphere. They began showing up at high latitudes late last week and this weekend.

January’s birthstone is the garnet

Happy birthday January babies!  Your birthstone is the garnet.

Here’s the path of 2017’s solar eclipse

This video from NASA shows the path across the U.S. of the August 2017 solar eclipse.

Earthquakes in Nevada this morning

The U.S. state of Nevada experienced several moderately strong earthquakes and multiple aftershocks, beginning just after midnight local time Wednesday morning.

Top 16 Earth images of 2016

Take a few minutes to enjoy these images of our planet taken by astronauts aboard the International Space Station.

Why pine trees smell so good

Pine, spruce, and fir trees – Christmas tree favorites – produce chemicals called terpenes, which give them their special, distinctive scent.

The water whorls of baby starfish

Video shows the beautiful and efficient mechanism that tiny starfish larvae use to swim, feed and grow.

Personal solstices

Photos from EarthSky community members around the world, showing what this week’s solstice – bringing winter to half of Earth, and summer to the other half – meant to them.

December solstice 2016 is the 21st

December solstice 2016 arrives on December 21 at 10:44 UTC. High summer for the Southern Hemisphere. For the Northern Hemisphere, the return of more sunlight!

Where noon comes only once a year

At Earth’s South Pole, high noon comes only once a year, on the December solstice. Meanwhile, the North Pole is getting its only midnight.

Watching solstices, equinoxes from space

A satellite view of how sunlight falls on Earth’s surface during the solstices and equinoxes illustrates how our planet’s tilt causes a change in seasons.

Solstice tale of two cities

December solstice sunrise comes at the same time for St. Augustine, Florida and New York City. But St. Augustine has an hour more of daylight than New York. Here’s why.

Scientists find jet stream in Earth’s core

ESA’s Swarm satellites have discovered a jet stream in the liquid iron part of Earth’s core, nearly 2,000 miles (3000 km) below the surface.

How likely is a white Christmas?

Are you dreaming of a white Christmas? Here’s the historic probability for one, in the U.S.