Waterfall illusion: Still objects seem to move

Check out this optical illusion and find out what it says about your brain.

Video: Perpetual ocean

In honor of World Ocean Day on June 8, a beautiful video visualization of ocean currents around the world.

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.

A large green and orange nebula with stars clusters.

Here’s a portrait of a family of stars

NASA’s Spitzer Space Telescope was used to create this large mosaic of stars and dust clouds in the direction of the constellation Cepheus. Here are multiple star clusters – young, middle-aged and older – born from the same dense clumps of gas and dust.

Scuba diver under water.

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.

Video: Asteroid 1999 KW4 as it swept past

It wasn’t visible to the eye, but some telescope users in Earth’s Southern Hemisphere caught it at its May 25 closest approach. Now Northern Hemisphere observers will get their chance. Charts here, and check out this cool video!

Animated map of lines along a tan terrain.

Video: Fly over Curiosity’s route on Mars

Follow the route of NASA’s Curiosity Mars rover, as it moves to a new part of Mount Sharp, into an area scientists call the “clay-bearing unit”.

Gray and white pattern, with smaller black blobs.

Shrinking moon might be generating moonquakes

The moon is shrinking as its interior cools. As it shrinks, its crust wrinkles and cracks, forming “thrust faults” that, according to a new analysis, generate moonquakes.

A man standing ankle-deep in brown water in a wetland grove of trees.

The oldest known tree in eastern North America

Scientists say a bald cypress tree in the North Carolina wetlands is at least 2,624 years old.

The curve of the Earth viewed from orbit, with a kite-shaped sail above it.

Lightsail 2 set to launch in June

“We are go for launch!” said Planetary Society CEO Bill Nye. Funded by space enthusiasts, LightSail 2 aims to accomplish the 1st-ever, controlled solar sail flight in Earth orbit next month.

Simulating stars’ sounds to reveal their secrets

“A cello sounds like a cello because of its size and shape,” said astronomer Jacqueline Goldstein. “The vibrations of stars also depend on their size and structure.”

Sunrise video still from Hideto Shimizu in Japan.

Nature in Japan: Time travel

Hideto Shimizu hiked many miles across the mountains of Japan to capture the images in this gorgeous 90-second video. He wrote: “I hope it delivers you the feelings of the places I photographed.”

Was moon created from proto-Earth magma?

A new study suggests that our moon formed from a splash of magma when a large object crashed into a proto-Earth covered in a fiery ocean.

The strangest crab that has ever lived

Meet Callichimaera perplexa, the platypus of crabs. It’s a 95-million-year-old extinct species that, scientists say, will force us to rethink the definition of a crab.

Today in science: Neil Armstrong’s close call

On May 6, 1968 – more than a year before his famous first moonwalk – Neil Armstrong narrowly escaped disaster during a training exercise, at the same time demonstrating the right stuff.

Space rock hit moon at 38,000 mph

It was a flash of light seen on the edge of moon during the total lunar eclipse of January 20-21, 2019. Now astronomers have analyzed this meteor strike, the first ever filmed during an eclipse.

Red star feeding black hole accretion disk, with wobbling jets coming from the hole.

Black hole’s gravity seen tugging on nearby space

“We were gobsmacked by what we saw in this system. It was completely unexpected … It tells us a little more about that big question: ‘How did we get here?'”

Listen to 1st-ever recorded marsquake

On April 6, NASA’s Mars InSight lander captured the 1st-ever audio of a likely “marsquake.”

Universe’s 1st type of molecule found at last

Scientists have detected the 1st type of molecule that ever formed in the universe – a combination of helium and hydrogen called helium hydride – in a planetary nebula near the constellation Cygnus.

Rain over Asia foreshadows intense California heat

When heavy rain falls over Southeast Asia and the eastern Pacific Ocean, temperatures in California’s Central Valley will reach 100 degrees F (38 C) in 4 to 16 days, says a new study.