Uncategorized
- Anthropology
Climate shift shaped Aussie extinctions
Stone Age people lived virtually side-by-side with now-extinct animals in western Australia for 6,000 years.
- Health & Medicine
Striking a Better Bargain with HIV
Because a drug frequently used to block the transmission of HIV from mother to infant may have negative consequences for the mothers, researchers are looking for inexpensive treatments that will benefit both mother and child.
- Math
Pieces of Numbers
A long-sought proof has forged an intriguing link between numbers expressed as sums and as products.
- Humans
Letters from the June 18, 2005, issue of Science News
Road worriers “Navigating Celestial Currents: Math leads spacecraft on joy rides through the solar system” (SN: 4/16/05, p. 250) 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 […]
- Math
Winning at Tennis
The probability of winning a tennis set or match doesn't depend, in theory, on which player serves first.
- Humans
From the June 8, 1935, issue
Ancient, titanic beasts at a museum, a test of vision theory, and ethylene gas and ripening fruit.
- Ecosystems
Tallgrass Prairie
The Openlands Project played a key role in converting the former Joliet Arsenal in Illinois into the first national tallgrass prairie. This Web site traces the Midewin National Tallgrass Prairie’s history and provides a variety of classroom activities for students in grades 1 to 12. Lessons include plant investigations, predator and prey relationships, prairie climate, […]
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19561
Your article made the minimization of aflatoxins in peanuts sound beneficial until the recommendation to treat the ground beneath the peanut pallets with insecticides. This will induce harm to the soil wildlife on which African farmers and villagers are dependent and to any nearby water sources. It will also add a toxic substance to the […]
- Earth
Farmers without Fungus: How to store peanuts to reduce toxins
African peanut farmers can more than halve their exposure to a class of harmful fungal toxins called aflatoxins by adopting several simple measures after harvest.
- Materials Science
Micropower Heats Up: Propane fuel cell packs a lot of punch
Portable electronic devices such as laptops and MP3 players could soon run on miniature fuel cells that consume propane.
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19560
Your article refers to the Earth’s magnetic field only at very long wavelengths. In over 70 years’ exposure to science, I have never heard of our magnetic field having wavelengths. Please elaborate. Kenneth E. StoneCherryvale, Kan. Looking at Earth’s magnetic field at long wavelengths is analogous to looking at a picture in low resolution, says […]
- Earth
Icy Heat: Satellites look at heat flow through Antarctica’s crust
Using satellite observations of Earth's magnetic field, scientists can estimate the amount of heat flowing upward through Earth's surface under kilometers-thick ice.
