News
- Neuroscience
Sleep may trigger rhythmic power washing in the brain
Strong, rhythmic waves of cerebrospinal fluid wash into the human brain during sleep and may help clean out harmful proteins.
- Life
Vampire bat friendships endure from captivity to the wild
Vampire bats can form social bonds that persist from a lab setting to the outdoors, suggesting the cooperative relationships are like friendships.
- Science & Society
Alaska’s free money for residents hints at how universal basic income may work
Since 1982, Alaskans have gotten an annual oil dividend. Scientists say that program hints at the pros and cons of a universal basic income.
- Animals
Spider webs don’t rot easily and scientists may have figured out why
Spider silk doesn’t rot quickly because bacteria can’t access its nitrogen, a nutrient needed for the microbes’ growth, scientists say.
- 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.
- Life
Bird eggs laid in cold climates are darker, which may keep eggs warm
A global survey of bird egg color reveals a simple trend: the colder the climate, the darker the egg.
- Space
The solar system may have a new smallest dwarf planet: Hygiea
New images reveal Hygiea is round, a final criterion for promoting the wee world from asteroid to dwarf planet status.
- Humans
Dating questions challenge whether Neandertals drew Spanish cave art
A method used to date cave paintings in Spain may have overestimated the art’s age by thousands of years, putting its creation after Neandertal times.
- Animals
Congolese giant toads may mimic venomous snakes to trick predators
If Congolese giant toads mimic venomous Gaboon vipers, it would be the first reported case of a toad imitating a snake.
- Humans
Quarrying stone for Easter Island statues made soil more fertile for farming
Easter Island’s Polynesian society grew crops in soil made especially fertile by the quarrying of rock for large, humanlike statues, a study suggests.
