Best Inventions of 2008

From a genetic testing service to an invisibility cloak to an ingenious public bike system to the world's first moving skyscraper — here are TIME's picks for the top innovations of 2008

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8. Bullets That Shoot Bullets

active protective system

Think of the Army's new Active Protection System (APS) as Star Wars for soldiers, designed to protect them from rocket-propelled grenades and other short-range threats. Raytheon's APS will automatically detect an incoming round and then launch a missile to destroy it, all within a split second. If it works, future Army vehicles will be able to head into combat with less armor.

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