The theoretical notion of a 'quantum heat engine' has been around for several decades. It was first introduced around sixty years ago by Scovil and Schulz-DuBois, two physicists at Bell Labs who drew an analogy between three-level ...
The American coot is a somewhat drab water bird with gray and black feathers and a white beak, common in wetlands throughout North America. Coot chicks, however, sport outrageously bright orange and red feathers, skin, and ...
Plants & Animals
Dec 30, 2019
1
570
Life as we know it requires phosphorus. It's one of the six main chemical elements of life, it forms the backbone of DNA and RNA molecules, acts as the main currency for energy in all cells and anchors the lipids that separate ...
Environment
Dec 30, 2019
15
831
Research on fossilized fish from the late Devonian period, roughly 375 million years ago, details the evolution of fins as they began to transition into limbs fit for walking on land.
Archaeology
Dec 30, 2019
19
1088
When Nalini Nadkarni was a kid, she'd run home from school, climb into one of the eight maple trees in her parents' backyard and spend an afternoon there with an apple and a book.
Social Sciences
Dec 30, 2019
2
38
A growing number of Chinese scientists working in the United States and other parts of the world are returning to their homeland, enhancing China's research productivity.
Other
Dec 30, 2019
6
145
For the past few months Hasan Zaidi's phone has been ringing nonstop with calls from desperate residents in Pakistan hoping to get their hands on his newly invented air purifier as smog blankets the country.
Environment
Dec 30, 2019
0
7
Dense fog and hazardous air pollution blanketed northern India and disrupted hundreds of flights on Monday, as harsh winter weather sent temperatures plunging to near-record lows.
Environment
Dec 30, 2019
0
12
Not too long ago Coral Ben-Aharon, a 15-year-old sophomore at Granada Hills Charter High School, didn't bother to use her school's recycling bins—and didn't know how plastic waste contributes to greenhouse gas emissions.
Education
Dec 30, 2019
9
47
Gadgets that resemble little black hats are showing up on the heads of alligators in South Carolina.
Plants & Animals
Dec 30, 2019
0
90
