Uncategorized
- Humans
From the October 15, 1932, issue
THE SABER-TOOTH STRIKES The artist has made a sketch of a dramatic scene involving a horselike hornless rhinoceros. It shows the poor animal attacked by a long-tailed saber-toothed tiger. The great cat is pictured as attacking much as a modern tiger or lion sometimes attacks: gripping a hard hold with its forelegs, slashing at its […]
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Frog Guts
A little squeamish about dissecting a frog? Try the online virtual frog dissection at the Froguts Web site. The site also includes multiple-choice tests, lesson plans, and links to other frog pages on the Web. Requires the Flash 6 browser plug-in. Go to: http://www.froguts.com/
- Paleontology
Dear Mummy: Rare fossil reveals common dinosaur’s soft tissue
A mummified dinosaur unearthed in Montana a year ago is giving scientists a rare peek at what the creature's muscles and other soft tissues may have looked like.
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19028
The picture of the mummified dinosaur was amazing and a bit spooky. It is a great find. Patrick LeaheyGeneva, N.Y.
- Health & Medicine
Final Word? Breast surgeries yield same survival rate
Women with breast cancer who undergo partial-breast removal are just as likely to survive for at least 20 years as are women who have their entire breast removed.
- Math
A Fibonacci Fountain
The year 1202 saw the publication of one of the most famous and influential books in mathematics. Widely copied and imitated, Liber abaci introduced the use of Arabic numerals and the Hindu-Arabic place-valued decimal system into Europe. It was written by Leonardo Pisano, who became better known by his nickname Fibonacci. Helaman Ferguson’s Fibonacci Fountain. […]
- Math
A Fibonacci Fountain
The year 1202 saw the publication of one of the most famous and influential books in mathematics. Widely copied and imitated, Liber abaci introduced the use of Arabic numerals and the Hindu-Arabic place-valued decimal system into Europe. It was written by Leonardo Pisano, who became better known by his nickname Fibonacci. Helaman Ferguson’s Fibonacci Fountain. […]
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Long live the Y?
Researchers have identified a means by which the Y chromosome may forestall, or at least delay, the gradual degradation that some biologists argue will ultimately delete it from the human genome.
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Bacterial diet quiets worm genes
Genetically engineered bacteria help biologists turn off worm genes.
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19135
You report that “the sea squirt has the beginnings of a spinal cord, making it a so-called chordate.” That’s the same mistake I fight against each time I teach my zoology class. What makes a sea squirt a chordate is the notochord in the animal’s larval stage. A notochord is a skeletal component, not a […]
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Sea squirt’s DNA makes a splash
The DNA sequence of a sea squirt may reveal the origins of vertebrates.
- Plants
Drought-tolerant plant mined for survival genes
A drought-resistant South African plant is revealing its genetic secrets.
