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It seems to me that the stronger the social pressure against using marijuana in a culture, the more likely it will be that those who use it will be troubled, antisocial, or unusually independent. Hence, any increase in the incidence of mental problems after using marijuana could be attributed to an increased likelihood that those […]
- Astronomy
Old Stars Even Older: Determining a new age for the universe
Using particles accelerators to mimic the conditions inside stars, two independent research groups have found evidence that the most-ancient known stars are about a billion years older than astronomers had estimated.
- Humans
Letters from the May 22, 2004, issue of Science News
Further options “Surgical Option: Hysterectomy may top drugs for women with heavy bleeding” (SN: 3/27/04, p. 196: Surgical Option: Hysterectomy may top drugs for women with heavy bleeding) doesn’t mention that 13 to 20 percent of women with heavy menstrual periods have a common but often undiagnosed bleeding disorder called von Willebrand disease. Because this […]
- Paleontology
Rare English bits are oldest known charcoal
Analyses of small black chunks of material extracted from 420-million-year-old rocks found along the England-Wales border suggest that they're remnants of the earliest known wildfire.
- Archaeology
Guatemalan sites yield Maya insights
Excavations at three archaeological sites in Guatemala have provided new insights into both the early and late stages of ancient Maya civilization.
- Astronomy
Before the big one hits
The next time you hear about an asteroid or comet about to hit Earth, you can go to a new Internet site to find out where the collision will be and how much damage will occur.
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Neurons slow down for placebo effect
A placebo treatment temporarily quelled symptoms of Parkinson's disease in six people by decreasing the electrical activity of brain cells crucial to the condition.
- Health & Medicine
Herbal erection pills may be spiked
Some pills marketed as herbal remedies for erectile dysfunction contain drugs that should be available only by prescription.
- Earth
Filtered air cuts down mutations
Microscopic particles in the air may mutate the DNA of sperm.
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Two egg cells make fatherless mouse
By fusing two egg cells, researchers have created a mouse with no father.
- Astronomy
Windy endeavor
In early April, an Earth-orbiting satellite closed its doors after more than 2 years of collecting ions from the solar wind.
- Astronomy
Dark Doings
A slew of new and proposed experiments, ranging from the cosmic to the subatomic scale, may shed light on why the expansion of the universe is speeding up.
