He’s one of the few Republican presidential candidates willing to make foreign policy central to his campaign. He talks openly about launching airstrikes on Iran and compares U.S. troops to hobbits, distracting the bad guy from Lord of the Rings. And after the Iowa caucus Tuesday night, Rick Santorum has become one of the last major GOP alternatives to Mitt Romney.

Although he’s most famous for his conservative views on cultural issues, during the campaign, Santorum has played up his time on the Senate Armed Services Committee and warned of the persistent dangers of terrorism. Santorum has c...

By Mark Brown, Wired UK

For NASA’s Martian rovers, it seems that bigger is better. The $2.5 billion (£1.6 billion) Curiosity — which is currently whizzing towards the red planet following its November 2011 launch — is five times bigger than twin predecessors Spirit and Opportunity.

In fact it’s taller than most basketball players at 2.2 meters high, and is about the size of a small SUV with its three-meter length. Add on its humongous robot arm, which can reach out another 2.2 meters, and you’ve got only seriously huge rover.

To power such a beast needs a lot of energy and the...