Nearly a half a billion years ago, tiny horseshoe crabs crept along the shorelines much like today's larger versions do, new fossil evidence suggests.

Two nearly complete fossil specimens discovered in Canada reveal a new genus of horseshoe crab, pushing their origins back at least 100 million years earlier than previously thought.

Dubbed Lunataspis aurora, the ancient horseshoe crab is estimated to have been just 1.5 inches (4 centimeters) from head to tail-tip. That's much smaller than its modern-day relatives that can span nearly 20 inches (50 centimeters).

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Headgear Reverses AlzheimerÕs?
January 26th, 2008
Author Robert Roy Britt
A futuristic helmet, worn 10 minutes a day, reverses symptoms of AlzheimerÕs, its maker claims.

The helmet was built after a study at the University of Sunderland found infrared light can reverse memory loss in mice, according to The Daily Mail.

ÒCurrently all you can do with dementia is to slow down the rate of decay Ñ this new process will not only stop that rate of decay but partially reverse it,Ó said Gordon Dougal, a director of Virulite, a medical research company based in County Durham.

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(Both from LiveScience.com's website)