Stem cell advance

Stem cell advance
Stem-cell therapy is inching ahead. The study did not prove that it works, but other trials are started up. What took so long? More »

Ebola on the march!

Ebola on the march!
It’s “classic dogma”: Bad bacteria and viruses grow less dangerous over time. Not always! More »

Ebola’s end: History’s lessons

Ebola’s end: History’s lessons
As Ebola ravages West Africa, we seek answers in past epidemics. How did cholera, plague, smallpox end? Lacking drugs or a vaccine, how More »

Flying south for the winter?

Flying south for the winter?
A look at long-distance migration reveals surprising pattern. Migration did not originate in the tropics, home of bird diversity. More »

Lies and liars: Can you catch them?

Lies and liars: Can you catch them?
We asked how to catch a liar. Liars challenge our law, economy and society. If you want to catch a liar, you might as well flip a coin. More »

College admission conundrum?

College admission conundrum?
Critics carp about college entrance exams and point to data showing that high-school grades better predict success. How do the More »

Brewing biofuel

Brewing biofuel
The struggle to make fuel from wastes from farm, factory and forest continues. What’s keeping cellulosic biofuel out of the market? More »