This is a week of dueling shark-athons on television. A biologist advises viewers to take what they see with a large grain of sea salt.

Here's why, after a 2000-era plateau, global levels of the greenhouse gas are hitting new highs.

Researchers identified simple behavioral rules that allow these tiny creatures to collaboratively build elaborate structures - rafts and towers - with no one in charge.

Trillions of microorganisms living in your digestive system might influence your health, mood, even your weight.

Would climate change stop? The simple answer is no. A climate scientist explains.

Asgardia's 1st satellite - Asgardia-1 - will launch aboard a NASA mission to ISS later this summer. "Asgardians" are invited to send their personal data - a photo or a file of their choosing – to space with it.

Expert analysis showing how many people - and how much traffic congestion - can be expected along the path of the August 21, 2017 total solar eclipse.

When two heavenly bodies seem to come together: EarthSky community member Tom Wildoner explains the term "conjunction" in astronomy.

Ongoing drought - and increasing temperatures - have reduced water flow in the Colorado River, with more dramatic reductions expected. This ongoing, unprecedented event threatens water supplies in cities in the U.S. West and some of the most productive agricultural lands anywhere in the world.

Featured in National Geographic and Nature, Canadian amateur astronomer Christian Sasse explains how he created his unique star trails, by superimposing images.