23/01/2015

Bad reputation of crows demystified

In literature, crows and ravens arebad omens and are associated with witches. Most people believe they steal, eat other birds' eggs and reduce the populations of other birds. But a new study, which has brought together over ...

Why is Andromeda coming toward us?

I don't want to alarm you, but there's a massive galaxy heading our way and will collide with us in a few billion years. But aren't most galaxies speeding away? Why is Andromeda on a collision course with the Milky Way?

The cost of Chinese air pollution

China's fabled air pollution assaulted Linda Greer, J76, the moment she arrived in Beijing in 2008, on her first trip there for the Natural Resources Defense Council (NRDC). "I literally could not see down the block," she ...

page 4 from 8