One way to keep stem cells and other cells working is to avoid the loss of telomeres capping the ends of chromosomes. As cells divide,
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One biotechnology company executive flew from the United States to Colombia to try out her company’s gene therapy for lengthening telomeres. That decision bypassed U.S. government and other safety measures designed to protect human study participants. And no one knows whether it will work or doom her to cancer, which often relies on long telomeres to keep growing.
Other researchers are exploring more measured approaches to antiaging therapies. One study in dogs is testing rapamycin,
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If you had to have a prosthetic hand,
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A new study looks at one of the issues that prosthetic designers and wearers face in making this decision: the creepy factor. People tend to get creeped out by robots or prosthetic devicesthat look almost, but not quite,
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, human. So Ellen Poliakoff and colleagues at the University of Manchester in England had people rate the eeriness of various prosthetic hands.
Forty-three volunteers looked at photographs of prosthetic and real hands. They rated both how humanlike (realistic) the hands were and how eerie they were, defined as “mysterious, strange,
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, or unexpected as to send a chill up the spine.” Real human hands were rated both the most humanlike and the least eerie (a good thing for humans). Metal hands that were clearly mechanical were rated the least humanlike,
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, the team reports in the latest issue of Perception,
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[img]/sites/default/files/images/gt_chart_eerie[/img]The realistic prosthetics,
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