Uncategorized
- Earth
Plastics at sea create raft of problems
About 5.25 trillion pieces of plastic float in the world's oceans, a new study finds. That's a problem. This 269,000 tons of plastic can choke, entangle and poison a wide variety of sea creatures.
- Animals
Scientists say: Hibernaculum
This week’s word is hibernaculum, the word scientists use to describe the place where an animal goes to hibernate.
- Earth
Dino double whammy
Most scientists think an asteroid helped kill off the dinosaurs. But new calculations suggest that asteroid might have gotten some help from a long series of volcanic eruptions in what is now India.
- Climate
Thunderstorms can generate powerful radiation
Thunderstorms don’t just hurl lightning bolts. Some churn out high-energy radiation that can be seen by spacecraft. This radiation offers scientists a glimpse of the inner workings of thunderclouds.
- Animals
Electric eels get on their prey’s nerves
Electric eels wield remote control over their prey’s muscle movements. They do this by zapping their nervous system. Experiments suggest the creatures use these paralyzing bursts of energy to hunt, too.
- Chemistry
Asteroid impacts may have sparked life on Earth
The energy produced by comets and asteroids that collide with Earth may have been strong enough to start life.
- Physics
Picture This: Christmas from space
Satellite images show that cities brighten during holidays. Charting such changes can point to factors affecting energy use and contributing to global warming.
- Animals
A nervy strategy for transplants
Adjusting the electric charges in cells helped a transplanted eye reach out to its new host. The eye grew cells, which help transmit signals to other cells.
- Earth
Clouds may be dining cars for some germs
Scientists had known microbes could hitchhike across and between continents on clouds. New research now shows that some germs don’t just treat clouds as a high flying jet, but also as a cafeteria.
- Animals
Spidey sense: Eight-legged pollution monitors
Spiders that prey on aquatic insects can serve as sentinels that naturally monitor banned chemicals that still pollute many rivers across the United States.
- Animals
Virus blamed in starfish die-off
A virus may explains the deaths of millions of starfish along the Pacific Coast of North America. The deaths affect 20 species. Some of the stricken animals appear to melt into puddles of slime.
- Environment
Soot fouls subway stations — and maybe lungs
Soot levels in stations for New York City’s electric subway trains exceed the levels outdoors, a new study finds. The underground source of this black carbon: maintenance trains that share the tracks with subway trains. Breathing soot can aggravate asthma and other lung disease.
