News
- Climate
A new estimate triples the number of people in the path of rising seas
Sea level rise could flood coastal areas now home to 340 million to 480 million people by 2100, with Asia most affected, a study finds.
- Space
Rules guarding other planets from contamination may be too strict
Voluntary international guidelines for visiting the moon, Mars and other places — and for bringing stuff back to Earth — are overly cautious, scientists say.
- Humans
Humans’ maternal ancestors may have arisen 200,000 years ago in southern Africa
New DNA findings on humankind’s maternal roots don’t offer a complete picture of how and when Homo sapiens emerged.
