The permanent oxygenation of Earth's atmosphere took twice as long as previously believed and finally finished up to 100 million years later than expected.
Scientists in China have discovered a new species of deadly snake and have named it after a shape-shifting snake goddess from Chinese mythology.
People with major depression had accelerated cellular aging by an average of two years compared to healthy controls.
Thousands of acres of greenery in North Carolina were converted to 'ghost forests' in the last three decades, and the trend is expected to continue with climate change.
The 4-lb. (1.8 kilograms) chopper captured its first color photograph on Saturday (April 3), shortly after being lowered to the Martian dirt by the Perseverance rover.
The stainless-steel SN11 didn't stick its landing last week because of a plumbing problem, according to SpaceX founder and CEO Elon Musk.
A new vaccine approach to HIV that stimulates a set of rare immune cells showed 97% success at targeting those cells in its first tests in humans.
The tool essentially creates a "watch list" of newly discovered animal viruses that pose the greatest threat to human health.
Wally has been stirring up mischief by lounging on lifeboat slipways and capsizing passing dinghies, but conservation groups have warned tourists not to get too close.
Perseverance's laser hasn't yet penetrated the mystery of a strange Martian rock near the rover's new digs.
Baby sea stars may look innocent and adorable, but they're teensy little cannibals and eat their own siblings for their own survival.
Astronomers detected X-rays flaring out of Uranus for the first time. It could be a case of solar scattering, or some as-yet unknown process.