Uncategorized
- Health & Medicine
A Prized Worm
This year’s Nobel Prize in physiology or medicine went to researchers who pioneered the use of the tiny worm Caenorhabditis elegans as an animal model for exploring basic processes involved in the development and behavior of multicellular organisms. Learn more about the remarkable C. elegans from a Vanderbilt University news feature about this “elegant worm” […]
- Health & Medicine
Stressing out
A gene variant reduces people's response to the stress hormone cortisol, and people with the variant are less likely to have risk factors for heart disease and diabetes.
- Archaeology
Maya warfare takes 10 steps forward
The discovery of hieroglyphic-covered steps on the side of a Maya pyramid has yielded new information about warfare between two competing city-states around 1,500 years ago.
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Are we breaking the laws of thermodynamics? I often wonder, in discussions of hydrogen as fuel, how one can provide energy to split water to get hydrogen and oxygen, then react them together as fuel, and expect ever to get a net gain in energy. Tom OstwaldUniversity of CaliforniaSanta Barbara, Calif. The media have lately […]
- Chemistry
Hydrogen: The Next Generation
Researchers are looking for more sustainable ways to generate hydrogen, which burns cleanly but is typically made from fossil fuel.
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19096
The Japanese have developed an “artificial shark-fin machine” that produces a product quite similar in texture to the real thing. It’s being used in restaurants in Hong Kong. Let’s hope people’s tastes change before it is too late for the sharks. P.W.L. KwanBoston, Mass.
- Earth
Clipping the Fin Trade
New research and policy developments aim to curb the wasteful and gruesome practice of killing sharks solely for their fins.
- Math
Tilt-A-Whirl Chaos (II)
Tilt-A-Whirl in action. Sellner Manufacturing Co. The Tilt-A-Whirl amusement park ride serves as a wonderful example of a chaotic system. The unpredictable motion of the Tilt-A-Whirl’s cars occurs when the ride’s seven platforms travel at a speed of about 6.5 revolutions per minute along the undulating, circular track (see Tilt-A-Whirl Chaos (I), April 22, 2000). […]
- Math
Tilt-A-Whirl Chaos (I)
Tilt-A-Whirl. Sellner Manufacturing Co. Schematic drawing (top view) showing the Tilt-A-Whirl’s geometry. Much of the fun of an amusement park ride results from its stomach-churning, mind-jangling unpredictability. The Tilt-A-Whirl, for example, spins its passengers in one direction, then another, sometimes hesitating between forays and sometimes swinging abruptly from one motion to another. A rider never […]
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19095
In doing your usual excellent job of presenting information in interesting and lighthearted ways, you implied that bug zappers control mosquitoes. In fact, bug zappers don’t attract mosquitoes and therefore kill very few of them. They do kill large numbers of harmless and even beneficial insects, including pollinators and insects such as the crane fly, […]
- Health & Medicine
Into the Tank: Pressurized oxygen is best at countering carbon monoxide exposure
Oxygen treatment for serious carbon monoxide poisoning prevents long-term brain damage best if delivered as pressurized gas.
- Humans
Flame Out: Fishy findings sustain, then snuff, stellar career
Investigators have concluded that a young, up-and-coming physicist repeatedly faked data and committed other types of scientific misconduct.
