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Flying with the world’s fastest bird

The peregrine falcon is the fastest bird – and in fact the fastest animal on Earth – when in its hunting dive. Amazing BBC video here.

Global coral bleaching event likely ending

Good news for coral reefs at last! After 3 years, the global coral bleaching event is likely over, scientists say.

Why hottest weather isn’t on longest day

Solstice 2017 Рlongest day for us on northern Earth Рhas passed. But the hottest weather for the Northern Hemisphere is still to come. The reason is called the lag of the seasons.

Top 10 things about brown recluse spiders

It’s their active season. Here are 10 things to know about these venomous spiders that like to live where we do.

All you need to know: June solstice 2017

It’s that beautiful time of year again in the Northern Hemisphere, when the June solstice – your signal to celebrate summer – is nearly upon us.

Video: Watching solstices and equinoxes from space

See how sunlight falls on Earth’s surface during the solstices and equinoxes, and get a better understanding of why Earth’s tilt causes the seasons.

Summer solstice at Stonehenge

Why do people gather at Stonehenge in England on the solstice? Info and photos here.

Climate change shrinking Colorado River

Ongoing drought – and increasing temperatures – have reduced water flow in the Colorado River, with more dramatic reductions expected. This ongoing, unprecedented event threatens water supplies in cities in the U.S. West and some of the most productive agricultural lands anywhere in the world.

Video: Greenland’s thinning ice

The ice sheets are melting from both above and below, say scientists.

Cottonwood trees and the snows of June

Cottonwood trees in the American West are a nuisance to some and a treasure to others. They yield shade, beautiful foliage and, in June, a kind of warm, fluffy “snow.”

What is virga?

We’ve all seen virga, but maybe not known what it’s called. Virga is rain that evaporates before it hits the ground. Enjoy these photos!

World Oceans Day 2017

“Our oceans, our future” is the theme for World Oceans Day 2017.

Going to the beach? Watch this video

Rip currents – sometimes called by the misnomer rip tide – flow outward from beaches, sometimes faster than humans can swim. Here’s what to do if you get caught in one.

The undark nights of summer

Guy Ottewell lives in England. His illustrations of 3-dimensional space are illuminating. Long summer twilights, explained.

What exactly is twilight?

Sure, twilight is that magical time of day that lies between daylight and darkness. Astronomers, the experts on nighttime, recognize 3 twilights.

It’s twilight time: 15 favorite photos

“Love prefers twilight to daylight”
– Oliver Wendell Holmes

A rare lunar halo

Most ice halos around the sun or moon are made by plate- or column-like hexagonal crystals. The multiple halos in this image by Greg Redfern are from rare pyramidal ice crystals.

How do hurricanes get their names?

The Atlantic hurricane season starts June 1 and ends November 30. Here are the hurricane names for the 2017 season.

Top 5 questions about tornadoes

More tornadoes occur in the U.S. than any other country, mainly in the Great Plains, Midwest and southern states. Two meteorology professors answer questions.

These bees nest in sandstone

Rock is apparently no match for Anthophora pueblo bees. Scientists have found their sandstone nests scattered across dry lands in the U.S. Southwest.