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- Misleading mineral may have resulted in overestimate of water in moon
- Monkey caloric restriction study shows big benefit; contradicts earlier study
- Knowledge transfer between computers: Computers teach each other Pac-Man
- Drilling into trends in genetics, epigenetics of aging, longevity
- Underweight people at as high risk of dying as obese people, new study finds
- The first insects were not yet able to smell well: Odorant receptors evolved long after insects migrated from water to land
| Misleading mineral may have resulted in overestimate of water in moon Posted: 01 Apr 2014 10:11 AM PDT The amount of water present in the moon may have been overestimated by scientists studying the mineral apatite, researchers have discovered. For decades, scientists believed the moon was almost entirely devoid of water. However, the discovery of hydrogen-rich apatite within lunar rocks in 2010 seemed to hint at a more watery past. Scientists originally assumed that information obtained from a small sample of apatite could predict the original water content of a large body of magma, or even the entire moon, but a new study indicates that apatite may, in fact, be deceptive. |
| Monkey caloric restriction study shows big benefit; contradicts earlier study Posted: 01 Apr 2014 08:19 AM PDT The latest results from a 25-year study of diet and aging in monkeys shows a significant reduction in mortality and in age-associated diseases among those with calorie-restricted diets. The study, begun in 1989, is one of two ongoing, long-term U.S. efforts to examine the effects of a reduced-calorie diet on nonhuman primates. |
| Knowledge transfer between computers: Computers teach each other Pac-Man Posted: 01 Apr 2014 07:27 AM PDT Researchers have developed a method to allow a computer to give advice and teach skills to another computer in a way that mimics how a real teacher and student might interact. Researchers had the agents -- as the virtual robots are called -- act like true student and teacher pairs: student agents struggled to learn Pac-Man and a version of the StarCraft video game. The researchers were able to show that the student agent learned the games and, in fact, surpassed the teacher. |
| Drilling into trends in genetics, epigenetics of aging, longevity Posted: 28 Mar 2014 02:52 PM PDT A comprehensive analysis of the genetic and epigenetic mechanisms by an international group of scientists demonstrated that the majority of the genes, as well as genetic and epigenetic mechanisms that are involved in regulation of longevity, are highly interconnected and related to stress response. |
| Underweight people at as high risk of dying as obese people, new study finds Posted: 28 Mar 2014 07:30 AM PDT Being underweight puts people at highest risk of dying, just as obesity does, new research has found. The connection between being underweight and the higher risk of dying is true for both adults and fetuses. This is so even when factors such as smoking, alcohol use or lung disease are considered, or adults with a chronic or terminal illness are excluded, the study found. |
| Posted: 27 Mar 2014 08:16 AM PDT An insect's sense of smell is vital to its survival. Only if it can trace even tiny amounts of odor molecules is it is able to find food sources or avoid enemies. According to scientists, many proteins involved in the highly sensitive odor perception of insects emerged rather late in the evolutionary process. |
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