February 1, 2005
1 min read
Add Us On GoogleAdd SciAmBrief Points, February 2005
▪ Sleep less, weigh more? Compared with people who sleep eight hours, five-hour snoozers produce 15 percent more gherlin, a hunger hormone, and 15 percent less leptin, an appetite suppressor.
PLoS Medicine, December 7, 2004
▪ Anatomy shaper: the driving force behind the evolution of theHomospecies fromAustralopithecusmay have been the ability to run long distances, for hunting or scavenging across Africa's vast savannas.
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Nature, November 18, 2004
▪ Detecting neutrinos typically means looking for faint flashes that occur when the ghostly particles collide with atoms in water. An astrophysicist suggests that Jupiter's icy moon Europa could serve as a sensor of neutrinos a million times more energetic than those that can be caught on Earth.
physicsweb.org, November 25, 2004
▪ Antibodies from narcoleptic people induced a narcolepsylike symptom in the muscle of mice, suggesting that an autoimmune process plays a role in the sleep-wake disorder.
Lancet, December 11, 2004
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