Warming seawater might be the culprit, or seals might have gnawed the holes. For now, the strange circular holes in Arctic sea ice, photographed earlier this month, are mysterious.
Be a birder for a few minutes, and enjoy the distinctive song, dance and courtship display of a newly recognized Bird-of-Paradise, in new videos from the Cornell Lab of Ornithology.
"They might not always make it back to the exact beach where they were born, and instead might opt for beaches with similar magnetic properties, as if their internal GPS has just slightly mixed up addresses."
What's the latest date that measurable snow has fallen in different parts of the United States? Check this interactive map from NOAA to find your record latest snow.
How do we know earlier industrial civilizations on Earth didn't rise and fall long before humans appeared? That's the question posed in a new scientific thought experiment.