Moon craters reveal Earth’s history

Most scientists believe the moon and Earth have been bombarded by meteorites at a constant rate for the past few billion years. New research suggests that – in the past 300 million years – it’s been happening 2 to 3 times more frequently.

What made this giant spinning ice disk?

Crop circles step aside! A giant ice disk has been found on the Presumpscot River in Maine. The fascinating phenomenon is attracting thousands of onlookers, including ducks.

Front view of a squirrel covered in snow

Is winter miserable for wildlife?

Ever wonder if the animals you see outside your window in winter are doing OK? Don’t worry – they’re doing better out there than you would.

Black cricket on a green leaf

Insects get old before they die

Short-lived insects, like crickets, “get old,” – that is, lose some of their physical abilities – before they die, new research shows.

dark fossil outline in yellow stone

Did life on land arrive far earlier than thought?

New clues from fossils from the oldest soils on Earth suggest that multicellular, land-dwelling organisms might have emerged much earlier than we thought.

Whales share songs from other oceans

Singing humpback whales from different ocean basins seem to be picking up musical ideas from afar, and incorporating these new phrases and themes into their songs.

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.

Ship on the water with a buoy in the foreground.

Oceans warming even faster than thought

A new analysis has found that Earth’s oceans are heating up 40% faster than a United Nations panel estimated 5 years ago.

The shrinking Aral Sea

The Aral Sea was once the world’s 4th-largest lake. But in the 1960s, the Soviet Union diverted 2 major rivers to irrigate farmland, and the Aral Sea has been slowly disappearing ever since.

Horseback rider crosses a yellow plain, in front of a snow-covered mountain .

Black carbon from Gulf War shows up in Tibet glacier

A study traces black carbon from 1991 Kuwait oil fires to ice in northern Tibet. Researchers say this soot could affect glacier melt at the Tibetan plateau, considered the “Water Tower of Asia.”

Photo shows a A sparkling violetear and a brown violetear displaying their neck side-feathers, so-called “ears,” to dissuade each other from using their weaponized bills, which have strongly serrated edges and dagger-like tips.

Watch hummingbirds feed – and fight – in slo-mo

Turns out some hummingbird bills have evolved for fencing as well as sipping nectar.

More East Antarctica glaciers are waking up

Researchers have said that Totten Glacier, a behemoth with enough ice to raise sea levels by 11 feet (3.4 meters), appears to be melting. Now, they say 4 glaciers west of Totten, and a handful farther east, are also losing ice.

Why are moths attracted to flame?

Moths – and many other flying insects – are probably more disoriented by a close light source than they are attracted to it.

EarthSky’s top 5 stories of 2018

From the months-long eruption of Hawaii’s Kilauea Volcano to a strange object discovered on the surface of Mars – and more – here’s a quick roundup of the stories our readers enjoyed most in 2018.

Animal world is awesome: 3 essential reads

The elusive fossa, deepsea corals and a tropical frog which has developed resistance to a deadly fungus. Here are 3 stories from 2018 that remind us how awesome the animal world is.

Why can’t we feel Earth’s spin?

We can’t feel Earth rotating because we’re all moving with it, at the same constant speed.

What are your chances for a white Christmas?

For people in the continental United States, here’s your historic probability of getting a white Christmas in 2018.

Where noon comes just once a year

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

Did a supernova kill off the megalodon?

A new study suggests that a tsunami of cosmic energy from a supernova killed off large ocean animals – including the huge megalodon shark – 2.6 million years ago.

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.