Uncategorized
- Paleontology
Egg-Citing Discovery: Dinosaur fossil includes eggshells
The first-ever find of shelled eggs inside a dinosaur fossil bolsters ideas about the reptiles' reproductive physiology.
- Humans
Letters from the April 16, 2005, issue of Science News
Ax questions, hard answers Another hypothesis for the polish on the Stone Age corundum ax head is that the Stone Age people never had absolutely pure corundum, which indeed would have required diamond to polish (“In the Buff: Stone Age tools may have derived luster from diamond,” SN: 2/19/05, p. 116). It is possible that […]
- Health & Medicine
Smelly garlic: A lung tonic?
Fresh garlic or its powdered equivalent might prevent a potentially lethal condition in which pulmonary blood pressure is selectively elevated.
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Breath training aids sprint power
Breath training may help athletes who perform short, high-intensity activities such as sprinting.
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In this article researcher S. Jill James implicates low glutathione and heavy metal exposure in autism. This may be the case, but glutathione has a number of important functions that have nothing to do with heavy metal binding. As an antioxidant, glutathione reduces toxic free radicals. Glutathione is also a key factor in the maintenance […]
- Health & Medicine
Blood hints at autism’s source
A new biochemical profile in blood may lead to earlier diagnosis of autism and a better understanding of its genetic causes.
- Health & Medicine
Viagra might rescue risky pregnancies
Viagra shows promise for limiting threats of fetal loss from preeclampsia, a type of high blood pressure that frequently occurs during pregnancy.
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Blue light keeps night owls going
A study of nine young men suggests that blue light is more effective than yellow at beating back sleepiness and muting key physiological changes that normally occur in late evening.
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Research results on the physiological effects of blue light 1.5 hours before bedtime makes me wonder about the effects on sleep and, subsequently, mood and metabolism for the millions of us who spend hours each night staring into two sources of blue light, the television and the computer screen. Jill HolmgrenFairbanks, Alaska
- Planetary Science
A moon with atmosphere
Magnetic measurements by the Cassini spacecraft have revealed that Saturn's moon Enceladus has a tenuous atmosphere containing water vapor.
- Earth
Blowflies shed mercury at maturity
Blowflies that absorb mercury from fish carcasses they feed on as larvae rid themselves of much of that toxic metal when they become adults.
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This article gives the casual reader the distorted view that one could travel the solar system at will by using these methods. These are generally small perturbations on the much larger primary propulsion requirement that is fixed by standard two-body orbital mechanics. John OldsonSan Diego, Calif. In the course of its eccentric orbit, the moon […]
