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What is wet-bulb temperature? And how hot is too hot?
The wet-bulb temperature is a measure of the deadly combined effects of temperature and humidity. See an interactive map here.
August 8, 2023
Geoengineering accidentally for decades? Looks like it
Have we been geoengineering accidentally for decades? Hank Green thinks so. Now he points to sulfur dioxide as a possible road to (temporary) cooling.
August 4, 2023
Iridescent contrails? Rainbow contrails? Something else?
They look like iridescent contrails. But, are they? We asked Les Cowley, an atmospheric optics expert, who gave a different opinion.
August 2, 2023
Can we predict earthquakes now? No, but there’s news
It hasn't been possible before now to predict earthquakes. But 2 French researchers now claim to have discovered a way to do it.
August 2, 2023
Parachuting beavers created a fire-resistant wetland
NASA satellite imagery showed that a creek where beavers built dams was lusher, greener, and more fire-resistant than neighboring areas without beaver dams.
July 30, 2023
Tigers are the biggest cats: Lifeform of the week
Tigers are huge, fierce cats that are unique and beautiful. We tell you some curious facts about them here. Plus, watch a video about tigers.
July 29, 2023
7 fireballs in 1 night! The Alpha Capricornids roar
This week, a camera saw 7 fireballs in 1 night! If you wish to see some celestial fireworks, the Alpha Capricornids are active all night long this time of year!
July 28, 2023
Beluga Boat cam now live! And well worth watching
Click into these videos to see the Beluga Boat cam, from Manitoba's Churchill River. Belugas live, hunt and migrate in "pods." Hear their vocalizations!
July 27, 2023
World’s biggest permafrost crater growing, as Earth warms
New drone footage has revealed details of the world's biggest permafrost crater - Batagaika Crater in Russia's far east - and its rapid growth.
July 26, 2023
Record temps continue on land and in the water for 2023
Areas all around the Northern Hemisphere are suffering through record temps, as the summer of 2023 brings extreme heat. See record highs here.
July 26, 2023
