Uncategorized
- Earth
Life Landed 2.6 Billion Years Ago
Unusually carbon-rich rocks found in eastern South Africa may push back the evidence of life on land to 2.6 billion years ago, more than twice the current age of indisputably terrestrial organisms.
- Humans
Letters from the October 16, 2004, issue of Science News
Hubble grumble The cover type “Farewell to Hubble?” (“End of the Line for Hubble?” SN: 7/24/04, p. 56: End of the Line for Hubble?) makes me wonder why we haven’t seen the headline “Farewell to the Current NASA Administrator?” The only reason I have heard for the cancellation of the planned servicing mission is “it’s […]
- Humans
From the October 13, 1934, issue
A wingless rooster, production of artificial radioactive elements, and novae proposed as the origin of cosmic rays.
- Animals
Bird Calls
The Macaulay Library at Cornell University has the largest collection of animal sounds in the world. More than 67 percent of the world’s birds are represented in the center’s 160,000 recordings, along with sounds made by insects, fish, frogs, and mammals. The Library also archives and preserves a sampling of the behaviors of different animal […]
- Health & Medicine
Dormant Cancer: Lack of a protein sends tumor cells to bed
Excess amounts of a protein called Myc triggers cancer in mice, but ratcheting back this supply sends the malignant cells into dormancy.
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Because the purpose of wind machines is to take energy out of the wind, it is counterintuitive to find the wind’s average velocity increases inside the wind farm. This is not what I learned in Aerodynamics I. Some clarification, please. John ToomayCarlsbad, Calif. Remember boundary layers. The wind speed at windmill level is higher than […]
- Earth
Change in the Weather? Wind farms might affect local climates
Large groups of power-generating windmills could increase wind speed, temperature, and ground-level evaporation, thereby influencing a region's climate.
- Health & Medicine
Fat Fuels PCB Damage: Diet influences toxic effects leading to heart disease
Certain types of dietary fats can magnify PCB damage to artery cells in a way that sets the stage for cardiovascular disease.
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Hearing Better in the Dark: Blindness fuels ability to place distant sounds
New evidence indicates that blind people estimate the locations of distant sounds more accurately than sighted people do, even if sight loss didn't occur until adolescence or young adulthood.
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A.M. and P.M. Clocks: Fruit fly brain has double timekeepers
Two research teams have pinpointed one group of fly-brain neurons keeping time for morning activity and a different neuron group performing the same function for evening activity.
- Chemistry
Breakdown: How Three Chemists Took the Prize
The Nobel Prize in Chemistry has been awarded to three scientists for their discovery of how cells mark proteins for destruction with a molecular tag called ubiquitin, otherwise known as the kiss of death.
- Planetary Science
Mars Rovers: New evidence of past water
Twin rovers on opposite sides of the Red Planet have found additional evidence that liquid water once flowed there.
