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To sea or not to sea: When it comes to salmon sex, size sometimes doesn't matter

The ones that stay and the ones that stray are biological puzzles among Pacific salmon, of whom the vast majority ?but not all ?travel thousands of miles to sea and back to the streams where they hatched. There are chinook salmon populations in Idaho in which an occasional male stays put and matures when only 6 inches long ?that is, he's able to fertilize eggs at even that diminutive size,...

What the eye doesn't see

The first experimental evidence that birds can be deceived by camouflage in the same way that humans are deceived, is published today in Nature [3 March 2005]. The idea that bold contrasting colours help to break-up the body's outline was rapidly adopted by many armies as long ago as the First World War. And in biology this idea of 'disruptive colouration' has long been used to explain ho...

Study finds evolution doesn't always favor bigger animals

Biologists have long believed that bigger is better when it comes to body size, since many lineages of animals, from horses to dinosaurs, have evolved into larger species over time. But a study published this week by two biologists at the University of California, San Diego in an early online edition of the Proceedings of the National Academy of Sciences suggests that maxim, known as "Cop...

'Failed' experiment yields a biocontrol agent that doesn't trigger antibiotic resistance

MADISON - A failed experiment turned out to be anything but for bacteriologist Marcin Filutowicz. The discovery also led to the startu...

Why doesn't the immune system attack the small intestine?

Answering one of the oldest questions in human physiology, researchers at Dana-Farber Cancer Institute have discovered why the body's immune system - perpetually on guard against foreign microbes like bacteria ?doesn't attack tissues in the small intestine that harbor millions of bacteria cells. In a study in the February issue of Nature Immunology, and which is currently available on the...

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Patent ruling doesn't tarnish Wisconsin's stem cell leadership

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Sir Ken Robinson: Companies, kids "get" innovation, but K-12 doesn't nurture it

Robinson, a senior advisor to the in Los Angele...

Green doesnt up the ante on markup law

Green, however,...

Measuring what works and what doesn't in the prototypical school

If you're looking for an ambitious mission statement, consider this pledge from the bipartisan Wisconsin School Finance Adequacy Initiative: "We will not simply propose adding new dollars on top of current dollars, but propose a complete new reuse of all dollars first those currently in the (K-12 public school) system, and then any additional dollars if that is the...

Technology industry doesnt have a monopoly on speed

I recently checked out the If you work in technology, searching the group arch...

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doesn at Medicine News

Deep Sleep Doesn't Increase Memory

Students who go to bed early to be ready for a big test the next day might be missing the mark, according to a study to be released Friday by a San Fernando Valley researcher that finds a good night's sleep does not increase memory. // REM sleep is a deep sleep during which an individual's eyes dart rapidly under closed eyelids and the body is almost completely paralyzed except for...

Stretching the muscles doesn't make them more resilient

Stretching before or after hitting the squash court might be a waste of time. It does little to reduce injuries or muscle soreness, say researchers. Warning up and cooling down by stretching was thought to reduce the risk// of unused muscles going into painful spasm. The spasm theory turned out to be wrong, but the stretching habit stuck. It is one of the “many superstitions about how to...

Less exercise doesn't help prevent osteoporosis

A recent study reveals that everyday activities such as walking and housework may be good for the heart, but don't do much for the bones. Researchers at Johns Hopkins University have studied a group of people aged// 50 to 60 who had higher than average blood pressure, but were otherwise healthy. They measured their aerobic fitness, muscle strength and abdominal fat, to see how these were...

Promised Drug Doesn't Help Acute Heart Failure

Intravenous administration of the drug tezosentan did not improve worsening heart failure or prevent death in patients with acute heart failure // despite high hopes. The above fact was found out in the largest international trial on acute heart failure to date. The study was conducted to evaluate if something more could be done for acute heart failure patients in order to speed up hospit...

Cocoa: Doesn’t Taste Like Red Wine But Has Benefits Like It

Chocolates have been elevated to the level of health friends. In the same league a key ingredient of chocolate cocoa has been shown to have benefits for coronary heart disease. New research suggests that cocoa // may also have a beneficial effect on heart disease and stroke. A research team in Southampton in England, led by Dr Denise O'Shaugnessy, has shown that drinking a cup of cocoa...

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