SA’s Herschel space observatory made new observations of asteroid Apophis as it approached Earth this weekend. The data shows the asteroid to be bigger than first estimated, and less reflective.
Researchers worry that a loss of genetic variation in microbial communities in the Amazon’s converted agricultural land could negatively affect the entire ecosystem.
At present, there's a remote chance that Apophis will strike us in 2036. It's expected to drop to zero after the early 2013 pass of Apophis near Earth.
The nighttime twinkling of fireflies has inspired scientists to modify a light-emitting diode (LED) so it is more than one and a half times as efficient as the original.
The discovery of six likely comets around distant stars suggests that comets -- dubbed "exocomets" -- are just as common in other stellar systems with planets.