Paul D

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Deep-Space Engines

Propulsion systems that could carry astronauts to Mars and beyond.<p>STAR-48<p>The fastest chemical rocket ever, the Star-48 engine was built to launch satellites and was recently incorporated into the New Horizons probe, which took off in 2006. Powered by burning a mixture of ammonium perchlorate and …

Al Worden: ‘The loneliest human being’

What’s it like to be the most isolated human in all eternity? Our space correspondent meets Al Worden, command module pilot of Apollo 15, who holds that dubious honour.<p>Seven men in the history of humanity stand apart from the rest of us. These are the Apollo command module pilots who spent time …

Low-Cost Robot Hand Can (Almost) Change A Tire

DARPA's three-fingered artificial hand is great at grasping, but can't quite manipulate tools.<p>The U.S. Defense Advanced Research Projects Agency is working on making dexterous robot hands to search for explosive devices, use tools, provide amputees with helpful replacements, and maybe even change …

Should you wait an hour after eating until swimming?

We are told taking a dip on a full stomach is dangerous because we might get cramp or a stitch, or even drown. But is there any truth to this?<p>I can still remember how slowly time seemed to pass as a child when I was on the beach, and had to wait an hour after I’d finished my sandwiches before I was …

Melting Glaciers Are Increasing Extent Of Sea Ice In Antarctica, Says Counterintuitive Study

Cold freshwater from melting Antarctic ice shelves is insulating sea ice from the warming ocean.<p>Climate change is expanding sea ice in Antarctica, a paradoxical finding that appears to be the result of melting glaciers, according to a new study. As freshwater glaciers melt, cold water sinks into …

Flurry says mid-sized phones rule and phablets are a fad

Flurry is a company that keeps its eye on the pulse of the mobile world. The company says that it now detects about 1 billion smartphones and tablets …

Rosetta Stone looks to the cloud with $8.5M acquisition of language learning site Livemocha

Advertisement<p>3 Comments<p>Rosetta Stone, one of the biggest names in language learning, has picked up Seattle-based startup Livemocha. In an …

Amazon is the cloud to beat, but Google has the cloud to watch. Here’s why.

Advertisement<p>10 Comments<p>Amazon(s amzn) Web Services is by far the biggest and most experienced public cloud provider. Accepting that, the next …

Michael Dell promises greater investment in PCs and tablets

In his quest to take the company private, the Dell CEO says he'll spend more money on PCs and tablets, hire more salespeople, and compete more aggressively overseas.<p>Michael Dell has revealed more details about his plans for the company if and when it goes private.<p>A memo from the Dell CEO to …

How NASA's Nuclear Rockets Will Take Us Way Beyond Mars

The first people to step on to the surface of Mars won't arrive aboard the chemical-fueled rockets that delivered Apollo 11 to the Moon—they simply …

Nuclear Energy