Once NASA's Curiosity rover safely touches down inside the Gale crater in August (*crosses fingers*), the real challenge begins. The 907kg, 3m long rover will begin searching for traces of a wet Martian past. But first, researchers at the JPL needed to make sure its sampling arm was up to snuff — here's how they did it. [JPL]
How Curiosity Will Scoop Its Way Around The Red Planet
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Five Massive Screw-ups That Wouldn't Have Happened If The United States Had Adopted The Metric System
Almost every country in the world uses metric measurements. Every country except for the United States, that is. It’s usually not a big problem. But there have been some close calls throughout history when people used metric instead of imperial, or vice versa with disastrous results.