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Here’s why, after a 2000-era plateau, global levels of the greenhouse gas are hitting new highs.
Researchers identified simple behavioral rules that allow these tiny creatures to collaboratively build elaborate structures – rafts and towers – with no one in charge.
This 5-second video shows a reflected image of the sun – a sun glint – as a bright spot crossing Earth from right to left. It also shows a dark spot – the moon’s shadow – moving the opposite way.
Among wild animals, pronking may be a way of avoiding predators. But when you see an animal pronk, you can’t but think it’s leaping for joy.
Scientists say they’re likely to be tardigrades – tiny, 8-legged marine creatures – which can survive until the sun dies, long after we humans have disappeared.
It’s said that once you’ve seen a green flash, you’ll never go wrong in matters of the heart. Here’s all you need to know … plus great pics!
An iceberg – about the size of the U.S. state of Delaware – split off from Antarctica’s Larsen C ice shelf sometime between July 10 and 12.
Recent increases in an unregulated ozone-depleting substance could delay recovery of Antarctic ozone levels by 5–30 years, say scientists.
Large plume of smoke from the Alamo Fire in southern California, blowing over the eastern Pacific on July 9. Areas burning actively at that time appear in red.
Look inside the bright primary bow for colorful fringes, whose number and spacing can change from minute to minute. Alexander Krivenyshev caught this one over New York City on Saturday, July 8.
Experts say there’s a 60% chance this weekend of geomagnetic storms, possibly causing auroras. Plus, over the past couple of days, a lone sunspot has grown rapidly!
Wonderful video showing noctilucent – or night-shining – clouds recorded on July 1 and 4. These clouds shine in the darkness, typically on summer nights.
To catch a glimpse of elusive anticrepuscular rays: Next time you see crepuscular rays – sunrays – at sunrise or sunset, turn around.
Would climate change stop? The simple answer is no. A climate scientist explains.
The 5.8-magnitude earthquake in western Montana took place just after midnight, local time. It woke people up near the epicenter and was felt throughout the region. Expect aftershocks.
We celebrate Asteroid Day on June 30 because it’s the anniversary of a 1908 explosion over Siberia that killed reindeer and flattened trees.
To capture an image like this one, where the sky rainbow and reflected rainbow in the water make a perfect circle, your timing has to be perfect.
Circumzenithal arcs have been described as an “upside down rainbow” or “a grin in the sky.” They’re wonderful! See photos here.
Across the US Southwest – amid a record-breaking heat wave – fires that started in early June continue to burn.
It’s possible to see the whole circle of a rainbow – but sky conditions have to be just right. Plus you have to be up high!
Find the Teapot, and the galaxy’s center
Hubble sees Phobos orbiting Mars