Brazil coronavirus variant capable of reinfecting those who already had COVID-19, research suggests

Researchers found that the Brazil variant, called P.1, is between 1.4 and 2.2 times more transmissible than other coronavirus strains and appears to be better at escaping natural immunity.

SpaceX delays Starlink launch again due to weather

Just a few days later, the space company hopes to launch its next batch of Starlink satellites. 

Wolf tracked near Yosemite for 1st time in 100 years

Gray wolves were eradicated in California early in the last century because of their perceived threat to livestock. Their reappearance in the state has riled ranchers, who say wolves have preyed on their livestock on public or private land.

Astronauts perform spacewalk to prepare ISS for new solar wings

NASA's Kate Rubins and Victor Glover ventured out Sunday to install support frames for new, high-efficiency solar panels arriving at the International Space Station later this year.

Mount Etna lights up Sicily's night sky with 6th eruption in 8 days

Etna erupted for the sixth time in eight days on February 24, according to local media, with footage from the area showing lava fountains shooting 500 meters into the air.

1,700 rehabilitated turtles returned to Texas waters

Another 1,700 sea turtles are safe and back in their ocean home after volunteers and rescue groups pulled thousands of the cold-stunned reptiles from Texas waters during a deadly winter storm.

Perseverance: Secret message planted on giant parachute that carried Mars rover

The huge parachute used by NASA’s Perseverance rover to land on Mars contained a secret message, thanks to a puzzle lover on the spacecraft team.

NASA's Perseverance rover beams back first images, audio recordings from Mars

NASA has unveiled high quality images from the Perserverance rover’s initial entry into Mars, as well as never-before-heard audio of a Martian breeze captured by the rover.

29-year-old bone cancer survivor chosen to join billionaire on SpaceX flight

Hayley Arceneaux will become the youngest American in space when SpaceX’s first private flight launches this fall - and the first with a prosthesis.

Boeing recommends airlines ground all 777s with engine that blew apart

Boeing has recommended that airlines ground all of 777s with the type of engine that suffered a catastrophic failure over Denver this weekend.

LISTEN: United pilot called 'mayday, mayday' amid engine failure after Denver takeoff

The pilot of a United Airlines commercial jet called "mayday, mayday" as the aircraft experienced engine failure shortly after takeoff from Denver International Airport on Saturday, according to new audio.

Deputies help rescue baby owl that lost its home

The baby is now being taken care of by the nonprofit Wild at Heart Wildlife Sanctuary.

Plane debris falls from sky onto Colo. neighborhood during emergency landing

A United Airlines plane experiencing a right-engine failure shortly after takeoff dropped debris over a Colorado neighborhood Saturday afternoon before turning around and making an emergency landing back at the airport.