The turmoil at Twitter has many people turning to an alternative, Mastodon. The social media platform does a lot of what Twitter and Facebook do, but there are key differences.

Emperor penguins survive in a ‘Goldilocks zone’ between too much sea ice and too little. Climate change is having an impact.

It’s tempting to focus on the minority of Americans who hold negative views about scientists. But blaming others for their lack of trust won’t build the relationships that can boost trust.

Studies of online echo chambers don’t paint the full picture of Americans’ political segregation. New research shows that the problem is more Fox News Channel and MSNBC than Facebook and Twitter.

Polar bears are increasingly seeking sustenance in human trash because of melting sea ice and a loss of hunting opportunities. The result is a rise in human-bear conflict – and dead bears.

Polar bears that hunt from freshwater ice in Southeast Greenland are "the most genetically isolated population of polar bears anywhere on the planet."

Polar bears that hunt from freshwater ice in Southeast Greenland are "the most genetically isolated population of polar bears anywhere on the planet."

Rather than simple splitting events, the evolution of polar bears and brown bears are like those of humans, a tangled story of divergence and interbreeding.

Russia probably has the means to attack US electrical grids and otherwise create havoc but probably won’t go that far. Instead, watch for disinformation aimed at undermining the US and NATO.

Polar bears are being forced to adapt their feeding habits due to climate change – so reports of summer scavenging, foraging and terrestrial hunting are unsurprising.