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Sci-Fi

Submission + - Regrowing lost body parts coming in the future

[TheBORG] writes: "There are two stories on Yahoo! News about regrowing lost body parts. One is about regrowing lost fingers & limbs and the other one is about regrowing teeth. The story about regrowing lost fingers and limbs talks about the experimental use of powdered pig bladder to regrow fingers and eventually lost limbs for soldiers and others in need from information that Pentagon-funded scientists hopefully learn from studying the salamander. The story about regrowing teeth talks about how Japanese scientists used primitive cells (not quite as early as stem cells) and injected them into a framework of collagen (the material that holds the body together). Once grown to a certain point, scientists implanted the growths into mice where the teeth developed normally."
Quickies

Submission + - Why does air pressure fluctuate in airplanes?

TimFreeman writes: "Commercial airlines have machinery for controlling the pressure in the air cabin. I assume this machinery can give them any pressure they want, so they could have the pressure in the plane change smoothly from the ground-level air pressure at the takeoff point to the ground-level air pressure at the destination. Instead, the pressure goes down when they take off and back up when they land. When I flew with blocked eustacian tubes four days ago, it hurt like hell, every takeoff and landing, and my right ear still hasn't healed.

Why do they permit the pressure fluctuation?"

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