Radio signal 9 billion light-years away: What it means and where it came from

Astronomers said it marked the first time this type of radio signal has been detected at such a large distance. "It’s the equivalent to a look-back in time of 8.8 billion years."

NASA announces plan to test nuclear rocket engine for possible Mars mission

NASA says they are testing the rocket engine with a plan to have an in-space demonstration by 2027. This technology could help astronauts travel to and from planets faster.

NASA's Virginia rocket launch expected to be visible across DC area; lift off scheduled for Tuesday

UPDATE: NASA has canceled the Electron rocket launch scheduled for Monday, Jan. 23 due to unfavorable weather conditions. The launch has been rescheduled for Tuesday, Jan. 24 between 6 p.m. and 8 p.m.

Nearly two-thirds of coral reef sharks threatened with extinction from overfishing as main cause, study finds

The study, published in Nature Communications, shows that 59% of the 134 coral-reef associated shark and ray species are being threatened with extinction, making them the most threatened groups found on coral reefs alongside marine mammals.

Dinosaur fossils unearthed in Chile may give insight into deadly asteroid strike

The new fossils are from birds and killer dinosaurs, such as the megaraptor, and provide clues about their life before — and after — the fatal asteroid strike.

First Native American woman in space steps out on spacewalk

Nicole Mann, a Marine colonel and test pilot, rocketed into orbit last fall with SpaceX, becoming the first Native American woman in space. She is a member of the Wailacki of the Round Valley Indian Tribes in Northern California.

Watch: Drone video captures the world’s largest hatching of baby turtles

Between mid-December and early January, millions of baby river turtles emerged from the sandy beaches of the Amazon’s Guaporé/Inténez River.

Polar bear emerged unseen from Alaska snowstorm to kill woman, baby

As the attack unfolded outside a school, the principal ordered a lockdown and closed the blinds so the children couldn’t see what was happening outside the entrance.

Greenland is the warmest it's been in more than 1000 years, ice core data shows

Scientists say warming in Greenland in the past may have been masked by local weather variability. But not any more. Climate change is blowing that away.

Watch: Boston Dynamics robot shows off eerily human-like moves in new video

The robot helps a construction worker in a simulated site get his tool bag before pulling off an impressive parkour-style flip as the cherry on top.

‘The Last of Us’ zombie fungal parasite is real and causes ants to commit suicide

If you thought fictional zombies walking around on film were scary, the condition that turns creatures into mindless eating machines actually exists in nature.

Russia to replace crew capsule at space station after coolant leak

Russian space corporation Roscosmos said Wednesday that it will launch a new spacecraft to take some of the International Space Station's crew back to Earth after their capsule was damaged and leaked coolant.

Ozone hole should fully mend by 2066, UN says

A United Nations scientific report says Earth's protective ozone layer is slowly but noticeably healing.

Bright green comet may become visible to naked eye later this month

C/2022 E3 (ZTF) hasn’t come so close to Earth since the last ice age, experts say. Here’s how you may be able to see it later this month.