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The undark nights of summer
Guy Ottewell lives in England. His illustrations of 3-dimensional space are illuminating. Long summer twilights, explained.
June 14, 2019
Has the ball lightning mystery been solved?
What is ball lightning? Scientists have been trying to figure that out for hundreds of years, and now it seems they may finally be close to solving one of Earth's most intriguing natural mysteries.
June 14, 2019
Sea sponges collect DNA from fish, penguins, seals
A new study reports that sponges, which can filter 10,000 liters of water daily, catch DNA in their tissues as they filter-feed.
June 6, 2019
How to celebrate World Oceans Day 2019
World Oceans Day is Saturday, June 8. Celebrate! Plan or find an event. Participate on social media. Or ... just go to the beach. Some ideas for participating here.
June 5, 2019
Melting small glaciers could add 10 inches to sea level by 2100
A new analysis of 200,000 glaciers worldwide paints a picture of a future planet with a lot less ice and a lot more water.
June 5, 2019
View from space: North America’s deepest lake
Roughly the same size of Belgium, Canada’s Great Slave Lake runs nearly 2,000 feet (600 meters) deep. This article from NASA Earth Observatory describes the lake and conditions around it in 2019.
June 4, 2019
Curiosity sees noctilucent clouds shining in Mars’ sky
Late last month, the Curiosity rover picked up wonderful images of noctilucent - or "night-shining" - clouds in the Martian sky. Plus - if you're at a high latitude on Earth now - it's time to start looking for these clouds.
June 3, 2019
Why super-sized beavers went extinct
Super-sized beavers were as big as black bears. They suddenly became extinct 10,000 years ago, while small modern beavers survived. Now scientists know why.
June 3, 2019
It’s hurricane season: 4 things to know
Atlantic hurricane season begins June 1 and ends November 30. Here's how forecasters make predictions, whether to stay or evacuate, what kinds of risks extend inland, and how your social networks can help or hurt you.
May 31, 2019
April 2019 2nd hottest on record for globe
April 2019 was the 2nd-hottest April in the climate record, dating back to 1880, and the period from January-April was the 3rd-hottest year-to-date on record. In the Arctic, sea ice coverage shrunk to a record April low.
May 30, 2019
