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.