Uncategorized
- Health & Medicine
Survey finds U.S. schools start ‘too early’
The school bell dings too early for U.S. tweens and teens, a survey finds. Most kids start class well before the recommended 8:30 a.m.
- Planets
Like Tatooine in ‘Star Wars,’ this planet has two suns
Scientists have found the tenth planet with two suns. Such planets might be more common than single-sun planets, like our own, a new survey suggests.
- Health & Medicine
More data link vaping to smoking
A new study finds vapers who don’t smoke are likely to start — even when they initially had no intention of ever taking up a cigarette.
- Physics
Scientists Say: Viscosity
We know some liquids are thick and some are thin. This week’s word describes the property of these liquids to resist tension or pressure.
- Animals
Chikungunya wings its way north — on mosquitoes
A mosquito-borne virus once found only in the tropics has adapted to survive in mosquitoes in cooler places, such as Europe and North America.
- Physics
Stephen Hawking says his group has solved a black hole puzzle
Physicist Stephen Hawking says light sliding along the outside of a black hole holds the key to understanding what’s inside.
- Animals
Boa constrictors stop their victims’ hearts
It’s a myth that boa constrictors kill by suffocation. A new study shows the snakes actually squeeze off blood flow, stopping the hearts of their prey.
- Agriculture
Plant ‘vampires’ lay in wait
A new study shows how some parasitic plants evolved the ability to sense a potential host — and then send out root-like structures to feed on them.
- Health & Medicine
News Brief: Stress may break diet willpower
A new study suggests stress can affect our behavior — and willpower — by making tasty foods look more irresistible.
- Physics
Scientists Say: Torque
Some forces pull and some push. This force produces turning or twisting.
- Chemistry
Nanosilver: Naughty or nice?
Nanosilver is in many products, from socks to toothbrushes. The tiny particles kill microbes. But it’s still unclear whether they can harm us or the environment.
- Climate
Beliefs about global warming vary by country
Opinions about climate change — whether it exists, what’s causing it and how dangerous it is — vary greatly around the world.
