Analysis: Should you buy the new iPhone 5?

After months of speculation and rumors that often precede new Apple products, the iPhone 5 has arrived. And with pre-orders set to begin Friday, the question is: Should you buy one?

Peugeot unveils petrol hybrid using compressed air

French carmaker PSA Peugeot Citroen unveiled Tuesday a petrol hybrid engine that stores energy using compressed air which it hopes will be a game-changing technology to improve energy efficiency.

Third radiation belt can wrap around Earth, probes reveal

With the flip of a switch, a pair of instruments designed and built by the University of Colorado Boulder and flying onboard twin NASA space probes have forced the revision of a 50-year-old theory about the structure of the ...

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