Video still of April 6, 2019 meteor.

Another asteroid disintegrates over Russia

A bright meteor was caught in many dashcam videos – in broad daylight – on April 6, 2019, over the Russian city of Krasnoyarsk. See a video compilation here.

Identical twin male astronauts sitting next to each other.

Does a year in space make you older or younger?

The NASA Twins study – featuring astronaut twins Scott and Mark Kelly – was the perfect space experiment. Scott spent a year in space aboard the International Space Station. Mark remained on Earth. The results?

Check out this peregrine falcon webcam

An EarthSky community member – Jody Kuchar – alerted us to the webcam, which is based in Wisconsin. Thank you, Jody!

Fly with the world’s fastest bird

When in its hunting dive, the Peregrine falcon is the fastest bird – in fact, the fastest animal – on Earth. Get a bird’s-eye view of the flight of this magnificent creature, in this video.

4-legged whale fossil found along coast of Peru

Fossil remains of a 4-legged whale with hooves suggest that this whale could walk on land. With a robust tail and webbed fingers, it might have propelled itself through water like an otter.

Curiosity rover captured 2 solar eclipses on Mars

Watch Mars’ moons Phobos and Deimos cross the sun in a pair of solar eclipses last month, in these animations made from images from the Curiosity rover’s cameras.

Alaska’s mountain glaciers: A 10-year story

Glaciers in Alaska are losing ice and contributing to sea level rise. To monitor these changes, a team of researchers has been flying scientific instruments on a bright red, single-engine plane since spring 2009.

Fungal disease killing off frogs, toads, salamanders worldwide

The disease, which eats away at the skin of amphibians, has completely wiped out 90 species and caused dramatic population declines in more than 500 more.

Line-drawing illustration of the passage of 2019 FC1.

Speedy asteroid buzzed Earth last week, 1 day before being detected

A small asteroid – now designated as 2019 FC1 – flew closer to us than the moon on March 28, 2019. Astronomers detected it 1 day later. It’s the largest of 14 asteroids to pass closer to us than the moon since 2019 began.

Robot particle disks.

Say hello to particle robots

Roboticists are fundamentally rethinking their craft. Particle robots don’t look like biological creatures, but they’re constructed like biological systems, vast in complexity and abilities, yet composed of simple parts. Are they a step toward the proverbial ‘gray goo’?

Astronomers clock super-fast pulsar speeding through space

The runaway pulsar escaped the blast wave of the supernova that formed it, astronomers say, and is hurtling through space so fast it could travel from Earth to the moon in just 6 minutes.

Storm in a cosmic teacup

Nicknamed the Teacup because of its shape, this quasar is causing a cosmic storm in a distant galaxy. The source of the squall is a supermassive black hole buried at a galaxy’s center.

A new species of killer whale?

In January, scientists captured footage of what might be a new species of killer whale near Antarctica.

Woot! 4,001 exoplanets and counting 

The Exoplanet Team, led by the Observatoire de Paris, announced this week that the list of known exoplanets – planets orbiting distant stars – has grown to 4,001!

Dinosaurs on a floodplain 66 million years ago.

Dinosaurs thrived before fatal asteroid impact

Scientists have debated whether the dinosaurs were already in decline before a massive asteroid impact finished them off 66 million years ago. New research shows they were thriving in their final days.

Green iceberg

Why are some icebergs green?

A new idea might solve a decades-long scientific mystery about why some Antarctic icebergs are tinged emerald green rather than the normal blue.

Watch right whale and calf interact with dolphins

Watch an endangered right whale mom and her baby interact with a group of curious dolphins. The video was shot via drone by NOAA researchers.

Eclipse shows moon move in reverse

Check out this interesting eclipse of the sun by Earth’s moon on March 6. A NASA spacecraft saw it. During the eclipse, the moon appears to reverse its direction!

How the moon got its sunburn

Every object, planet or person traveling through space has to contend with the sun’s damaging radiation – and the moon has the scars to prove it.

Big bird taking off from a wooden box filled with sticks on a tall pole.

Ospreys’ recovery is global conservation success story

Chemical pollution and hunting pushed ospreys – which are large, hawk-like birds – to the edge of extinction. Now they’ve rebounded and can be spotted worldwide, often nesting on human-made structures.