8,240 results
8,240 results for: Fish
- Paleontology
Large shadows fell on Cretaceous landscape
Paleontologists have unearthed the remains of what they believe could be the largest flying creature yet discovered—a 12-meter-wingspan pterosaur.
- Animals
When rare species eat endangered ones
To cut down on their salmon smolt catch, Caspian terns were encouraged to move from one island to another in the Columbia River.
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18955
I am writing to correct a significant inaccuracy in your recent article “Landfills make mercury more toxic.” As a member of the National Research Council’s committee that produced the report you cite, I feel obligated to correct your statement, attributed to that report: “Some 60,000 U.S. children are born with developmental impairments triggered by fetal […]
- Chemistry
Chemists Try for Cleaner Papermaking
Chemists have developed a novel technology that could help clean up the papermaking process.
- Ecosystems
Wanted: Reef Cleaners
Nearly 18 years after a near total die-off of algae-grazing urchins in the Caribbean, those herbivores are poised for a comeback—which could help save area corals.
- Math
Spotting Ladybugs
Ladybugs are among the most familiar of beetles. More than 4,000 species are found throughout the world, ranging in size from 4 to 18 millimeters. Also known as lady beetles or ladybirds, these insects (coccinellids) have rounded bodies and bright red, orange, or yellow wing covers, which usually bear an array of contrasting black spots […]
- Math
Spotting Ladybugs
Ladybugs are among the most familiar of beetles. More than 4,000 species are found throughout the world, ranging in size from 4 to 18 millimeters. Also known as lady beetles or ladybirds, these insects (coccinellids) have rounded bodies and bright red, orange, or yellow wing covers, which usually bear an array of contrasting black spots […]
- Earth
Toxic runoff from plastic mulch
By laying sheets of plastic across their fields, farmers can bring crops to market faster while reducing their vulnerability to many blights (SN: 12/13/97, p. 376). On the negative side, however, this polymer mulch creates impermeable surfaces over more than half of a planted field. That significantly increases the amount of rain and pesticides that […]
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Biological Dark Matter
The discovery that some genes encode RNA strands instead of proteins has surprised biologists.
- Earth
Landfills Make Mercury More Toxic
Landfill disposal of mercury-containing products can chemically transform the pollutant not only to make it more potent but also to foster its release into air.
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A bad month for condors
Two California condors in the wild—a hatching and a just-released juvenile—died the same week, as a third went missing.
- Animals
Condor chicks hatch in zoo and wild
Newly hatched California condor chicks indicate that reproduction is again taking place in the wild.
