Rockfall at Yosemite’s El Capitan caught on video

A visitor had a video camera handy during a rockfall at Yosemite's El Capitan on February 20, 2023. It happened during the annual firefall at Horsetail Falls.

Chinese balloon in high-res, from above, via a U2 pilot

A top-down view of the Chinese balloon that caused an uproar as it drifted over the U.S. in early February 2023, as seen from a US Air Force plane.

Stranded ISS crew: New spacecraft launched

On Friday, February 24, 2023, Russia successfully launched a replacement Soyuz spacecraft for the stranded ISS crew to ride home in.

Another Pacific winter snowstorm hits California

A Pacific winter storm has the US West Coast in its sights. Flooding rainfall, wind, and snow measured in feet are in store over the weekend.

Will brain changes in fighter pilots help astronauts?

Researchers in Belgium showed how brain changes in fighter pilots can help astronauts cope with the effects of space travel.

Leonardo da Vinci studied gravity, too

A new look at the notes of Leonardo da Vinci show that he studied and understood much about gravity centuries ahead of his time.

Nicolaus Copernicus born 550 years ago today

Today is the 550th birthday of Nicolaus Copernicus, who removed Earth from the center of the universe and set off a revolution.

Happy birthday, Galileo! Born February 15, 1564

Galileo Galilei was 1 of the world's greatest astronomers. He was born on February 15, 1564. His discoveries changed the way we viewed our world.

The science of kissing and why it’s good for you

Why does kissing feel good? Watch this video - the science of kissing - to learn why humans are drawn to puckering up and that it's good for you.

Why love really is a drug

On this Valentine's Day, watch a video about certain chemicals - including dopamine, oxytocin and vasopressin - making you feel good around someone you love.