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Faulty Fountains of Youth
As a source of new cells to revitalize tissues, adult stem cells may cause some of decline of the body in old age, but the link between the two is not as simple as it seems.
- Humans
Letters from the February 9, 2008, issue of Science News
Small, or just invisible? “Heavy Find: Weighty neutron stars may rule out exotic core” (SN: 1/12/08, p. 20) says that the companion star of the pulsar PSR B1516+02B must be “tiny” because it cannot be seen. Isn’t it possible that the companion is made of dark matter? Is there a “wobble” test or other way […]
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