It wouldn’t be spring in the climate change era without a massive heat wave in the Arctic.
The ice sheets are melting, and a new study research relies on state-of-the-art technology to reveal where the biggest losses are happening. It’s pretty freaking cool even if the results are bad news.
Scientists have struggled to understand why, after hundreds of years, Vikings suddenly abandoned their Greenland colony. New research suggests their economic over-reliance on walrus tusks—a valuable but dwindling trade commodity—had a lot to do with it.