24/09/2012

Large bacterial population colonized land 2.75 billion years ago

(Phys.org)—There is evidence that some microbial life had migrated from the Earth's oceans to land by 2.75 billion years ago, though many scientists believe such land-based life was limited because the ozone layer that shields ...

A warm, wet fall would dampen foliage colors

This summer was notable because of drought conditions in June and July, and searing heat in July, but that won't limit the beauty of Pennsylvania's fall foliage.

Automatic building mapping could help emergency responders

MIT researchers have built a wearable sensor system that automatically creates a digital map of the environment through which the wearer is moving. The prototype system, described in a paper slated for the Intelligent Robots ...

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