Enjoying EarthSky? Subscribe.

0 subscribers and counting ...

Scientists listen to ocean bubbles

A research team recorded the sound of methane bubbles seeping from the seafloor off the Oregon coast, with the aim of using acoustics to identify – and perhaps measure – this important greenhouse gas in the ocean.

Why does the ocean have waves?

Waves are created by energy passing through water. Here’s what you need to know, in 30 seconds.

Check out these mammatus clouds

Mammatus clouds can appear ominous. But, in a way that’s so common in nature, their dangerous aspect goes hand in hand with a magnificent beauty.

Dust from Africa spreads into the Americas

This past weekend, a massive dust cloud from Africa’s Sahara Desert swept across the Atlantic and caused hazy skies across Texas, Mexico and parts of Central America.

Mapping the threat of small near-Earth asteroids

65 million years ago, a monster asteroid wiped out 2/3 of all life on Earth, including the dinosaurs. But an astrophysicist explains why it’s the smaller near-Earth objects (NEOs) that pose a greater imminent threat.

Great white sharks dive deep into warm-water whirlpools

Researchers tracked 2 great white sharks to find out where they spend their time. Watch a cool video of the tricky job of tagging Lydia, a great white swimming in Florida waters.

Can sharks smile?

Dogs, monkeys and dolphins all show expressions akin to human smiles. Sharks may look as if they’re smiling, but are they, really?

Will your summer will be full of mosquitoes?

Now that it’s summer in the Northern Hemisphere, our thoughts turn to … mosquitoes! Here’s some handy info from a biologist.

Will climate change make rice less nutritious?

As atmospheric carbon dioxide levels rise, rice plants – the primary food source for more than 3 billion people – produce fewer vitamins and other key nutrients. 

Why do fireflies light up?

A firefly’s familiar glow is caused by a chemical reaction. Explanation here, plus many wonderful firefly photos.