Birds cross Himalayas

Birds cross Himalayas
Bar-headed geese hug the terrain as they cross the tallest mountains. Why does that take less energy than flying the shortest route? More »

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 »