Archive: 07/08/2011

Challenge to Groupon's model with trio of deals

(AP) -- Groupon's online coupons save people cash, but they're not always great deals for merchants. Some businesses complain that bargain hunters rarely return after scoring a cheap meal or massage.

Jul 08, 2011
4 / 5 (1) 1

Why shuttles are being retired, what's next

Thirty years of flight by NASA's space shuttles will end once Atlantis returns home from this last mission. The space agency will be looking to deeper space exploration, but the future is still somewhat unclear.

Jul 08, 2011
4.8 / 5 (8) 3

Unfazed by imperfections

While insulating against electrical currents in their interior, the surface of materials called topological insulators permits the flow of electron spins relatively unhindered. The almost lossless flow ...

Jul 08, 2011
5 / 5 (2) 1