A find in South Africa suggests that humans had mastered the skill of producing small stone blades – and could pass on the know-how – as early as 71,000 years ago.
'We know the answer to what it takes to save' polar bears, says environmental prize winner Steven Amstrup, who has gone to the Arctic to study the bears for 30 years.
The new research potentially plugs a big hole in the giant impact theory, long the leading explanation for the moon's formation.
The planet is not habitable, it is too close to Alpha Centauri B. But rocky planets tend to have siblings, researchers note, raising hopes others could be found in the system just 4.4 light-years distant.
Researchers examined rocks collected by astronauts during NASA's Apollo lunar landing missions, as well as a meteorite that originated on the moon to make the find.
Earth-sized planet: With a mass about 1.1 times that of Earth, it is strikingly similar in size. Could the Alpha Centauri B system hold more Earth-sized, but habitable planets?
A new study finds 'an unanticipated, abundant reservoir' of water on the moon, molecules formed on the surfaces of oxygen-bearing rocks bombarded by protons from the solar wind.
These findings suggest that other airless bodies in the solar system may also possess water on their surfaces, investigators added.
The fossilized brain, found in an extinct arthropod from China, looks very similar to the brains of today's modern insects.
Using the Atacama Large Millimeter/Submillimeter Array in northern Chile, an international team of astronomers found the spiral structure never seen before.