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How to watch Shark Week
This is a week of dueling shark-athons on television. A biologist advises viewers to take what they see with a large grain of sea salt.
July 24, 2017
Synchronized symphony of fireflies
This video shows a timelapse journey through Smoky Mountains National Park during world's largest gathering of synchronized fireflies. Beautiful!
July 24, 2017
Global methane levels hitting new highs
Here's why, after a 2000-era plateau, global levels of the greenhouse gas are hitting new highs.
July 19, 2017
Fire ants build with no master plan
Researchers identified simple behavioral rules that allow these tiny creatures to collaboratively build elaborate structures - rafts and towers - with no one in charge.
July 18, 2017
Moon shadow versus sun reflection
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.
July 17, 2017
Does your dog pronk?
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.
July 17, 2017
Last survivors on Earth?
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.
July 14, 2017
Massive iceberg breaks off Antarctica
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.
July 13, 2017
Possible new threat to Earth’s ozone layer
Recent increases in an unregulated ozone-depleting substance could delay recovery of Antarctic ozone levels by 5–30 years, say scientists.
July 12, 2017
California’s Alamo Fire, from space
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.
July 11, 2017
