NASA astronaut returns from year in space

NASA's Scott Kelly and cosmonauts Sergey Volkov and Mikhail Kornienko landed safely in Kazakhstan on March 2. The landing wraps up Kelly's one-year mission aboard the ISS.

Biggest ever US methane leak from California blowout

The Aliso Canyon leak, finally plugged on February 11, vented 100,000 tons of methane into the atmosphere - a climate impact equivalent to the annual emissions of half a million cars, say scientists.

Cockroach egg impressions from 4,300 years ago

More information about early human settlements - and in this case the insects who lived alongside them - is being found in ancient bits of broken pottery.

Simplified calendar and no time zones?

In the Hanke-Henry Permanent Calendar, there are no leap years and Christmas always falls on a Monday. Plus, it’s the same time everywhere on Earth.

Leap babies

If you’re born on a leap day, do you have birthdays only once every four years?

Record number of NASA astronaut applications

More than 18,300 people applied to join NASA’s 2017 astronaut class - almost three times the number received in 2012.

Plastics in ocean harm oysters

Ground-breaking data on a negative effect on oysters from microplastics, which enter our oceans via cosmetics, clothing, and industrial processes.

Space rocks from Florida fireball found!

A rare find by meteorite hunters in Florida, from the daylight meteor that streaked across skies in the U.S. southeast in late January.

Chelyabinsk meteor mystery 3 years later

It's been 3 years since the dazzling fireball over Chelyabinsk, Russia, and its aftereffects in 6 Russian cities. Yet scientists still don't know its origin.

Cool video on astrophotography workshop

Landscape photographer Mike Mezeul II leads a nighttime photography workshop under the dazzlingly dark skies of Big Bend National Park, in Texas.