8,283 results
8,283 results for: Fish
- Physics
Black hole recipe: Slow light, swirl atoms
Whirling clouds of atoms may swallow light the way black holes do, possibly giving scientists a way to test the general theory of relativity in the lab, not just in outer space.
- Earth
DDT treatment turns male fish into mothers
Injecting into fish eggs an estrogen-mimicking form of the pesticide DDT transforms genetically male medaka fish into apparent females able to lay eggs that produce young.
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Migration may reawaken Lyme disease
Lyme disease can hide in healthy-looking birds until the stress of migration drives it into a potentially infectious state.
- Chemistry
Power plants: Algae churn out hydrogen
Green algae can produce hydrogen, a clean-burning fuel that could one day power pollution-free cars.
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Glacial warming’s pollutant threat
Some Arctic wildlife are being exposed to high amounts of toxic wastes as glacial melting releases pollutants that had been buried in ice for decades.
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Is that salamander virus flying?
Scientists searching for the carrier of the iridovirus causing a salamander disease have dismissed frogs and fish, but not birds.
- Chemistry
Sensor sniffs out spoiled fish
A new electronic nose detects amine compounds produced when fish decay.
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Fading to black doesn’t empower fish
Field studies of three-spined stickleback fish dash a textbook example of the theory of how one species can take on a competitor's characteristics.
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How whales, dolphins, seals dive so deep
The blue whale, bottlenose dolphin, Weddell seal, and elephant seal cut diving energy costs 10 to 50 percent by simply gliding downward.
- Ecosystems
New protection for much-dogged shark
To rebuild northeastern U.S. populations of the spiny dogfish, the first fishing quotas on this species limit the harvest to roughly 10 percent of the 1998 haul.
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Do oxpeckers help or mostly just freeload?
A textbook example of mutualism—birds that ride around picking ticks off big African mammals—may not be mutually beneficial at all.
- Health & Medicine
New gene-therapy techniques show potential
Two technologies for transferring genes, one that uses mobile DNA called transposons and another that uses a weak virus, have proved successful in overcoming genetic disorders in mice.
