Uncategorized
- Humans
Stress turns hair gray by triggering the body’s fight-or-flight response
A study in mice finds stress responses deplete cells that give hair its pigment, making the strand white.
- Earth
Fed by human-caused erosion, many river deltas are growing
Deforestation and river damming are changing the shape of river deltas around the globe.
- Genetics
Ancient kids’ DNA reveals new insights into how Africa was populated
Four long-dead youngsters from west-central Africa have opened a window on humankind’s far-flung African origins.
- Animals
Collectors find plenty of bees but far fewer species than in the 1950s
An analysis of global insect collections points to a major collapse in bee diversity since the 1990s.
- Health & Medicine
The first U.S. case of a new coronavirus has been confirmed
After confirmation that a new coronavirus is transmissible between humans, U.S. health officials report a first case in Seattle.
- Earth
A 2.2-billion-year-old crater is Earth’s oldest recorded meteorite impact
The newly dated Yarrabubba crater in Western Australia extends Earth’s impact record by more than 200 million years.
- Space
Phosphorus, a key ingredient of life, has been found in a newborn star system
Astrochemists map phosphorus-bearing molecules in a star-forming cloud, giving clues to how this vital element may have arrived on Earth.
- Life
How bacteria create flower art
Different types of microbes growing in lab dishes can push each other to make floral patterns.
- Planetary Science
For the first time, an asteroid has been found nearer to the sun than Venus
A space rock dubbed 2020 AV2, found in close orbit around the sun, probably got there after a series of close encounters with rocky planets.
- Chemistry
A dance of two atoms reveals chemical bonds forming and breaking
Two rhenium atoms approach and retreat from one another in an electron microscope video.
- Health & Medicine
Hairy cells in the nose called brush cells may be involved in causing allergies
Some hairy cells in the nose may trigger sneezing and allergies to dust mites, mold and other substances, new work with mice suggests.
- Health & Medicine
Exploding cancer cells can cause serious side effects in CAR-T cell therapies
Blocking a protein caused cancer cells targeted with CAR-T cell immunotherapy to shrink rather than burst, which may help reduce inflammation.
