By David Hambling
Posted 01.11.2012 at 11:18 am 12 Comments
Defense systems can detect stealth submarines using two methods: sonar, which bounces sound waves off a craft, and radar, which can identify subtle disturbances on or below the ocean’s surface that can indicate a sub at depth. Now scientists are developing acoustic and fluid cloaking methods that could defeat both tactics.
Normally, when a ship sets sail, one of the goals is to avoid sinking. However, USNS Gen. Hoyt Vandenberg cast off yesterday with the express purpose of ending up at the bottom of the briny deep. Purchased by Key West for $8.6 million, the former U.S. Navy ship was then sunk by demolition experts to provide a platform for a new coral reef.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.