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birds,archeology,dinosaurs,flight,science
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Archaeologists have unearthed the fossil of a "four-winged" dinosaur bird – indicating that feathered dinosaurs may have been able to fly before the evolution of birds.

The long tail feathers of Changyuraptor, from north-east China, would have provided the stability and speed control required for a safe landing.

At four feet long and weighing 90 pounds, the creature, which lived 125 million years ago, is the biggest dinosaur of its type yet discovered.

The well-preserved fossil shows that its body was cloaked by a full set of feathers and, in comparison with its body size, the foot-long tail feathers were unusually long.
By Unknown
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The Bionic Leg provides motorized assistance with extension (straightening your knee), which kicks in when you're standing up from a seated position, swinging your leg forward between steps, and going up stairs. It also provides resistance for flexion (bending your knee), so it kicks in when you're lowering yourself down to sitting, squatting, or when you're going down stairs. It enables patients to move without having to compensate in ways that would slow down their rehab or possibly cause other complications.
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