About 250 million years ago, Earth faced its greatest catastrophe ... persisting for about 200,000 years. They were followed by voltzialean conifers, which flourished for around 1.5 million ...
The climate and early human societies were changing quickly during the fall of our closest evolutionary relative—and are big ...
In 1988, the U.S. Supreme Court defended the right to satirize public figures when it voted 8-0 to overturn a $200,000 ... years old, was confirmed to be the oldest discovered fragment of Earth's ...
Most climate models now show that cutting emissions won’t be enough to curb global warming, leading to new interest in carbon ...
Indeed, previous studies on the Chicxulub 10-km asteroid impact, which happened around 66 million years ago, revealed that dust ... medium-sized asteroids collide with Earth about every 100 000 to 200 ...
Trump will order a plan to dismantle the Education Department, advancing a campaign promise ...
For the first time on a global scale, 20 years of observations on Mars have been condensed into a single study led by ...
Found at the Coto Correa site in the Las Chapas neighborhood of Marbella in southern Spain’s Andalusia region, experts estimate the engravings may be over 200,000 years old, making it one of the most ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback