8,278 results
8,278 results for: Fish
- Ecosystems
Fierce invader steals nests from a native fish
The round goby, a Eurasian fish that has invaded the Great Lakes, is causing the decline of the mottled sculpin by displacing the native from its spawning sites.
- Paleontology
New Fossils Resolve Whale’s Origin
The first discovery of early whale fossils with key ankle bones intact provides compelling paleontological evidence that whales are closely related to many living ungulates, a relationship already supported by molecular data.
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Tracking down bodies in the brain
A new report that a specific brain region orchestrates the recognition of human bodies and body parts stirs up a scientific debate over the neural workings of perception.
- 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.
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A fish’s solution to broken hearts
The zebrafish can regenerate missing heart muscle.
- Health & Medicine
Stroke protection: A little fish helps
As little as one serving of fish per month offers protection against the most common form of stroke.
- Earth
Contraceptive ring could pose risks after its disposal
Discarded vaginal contraceptive rings could interfere with fishes' reproduction by releasing estrogen into streams.
- Health & Medicine
Too Much of a Good Thing: Excess vitamin A may hike bone-fracture rate
Dietary studies suggest that people who consume large amounts of vitamin A in foods or multivitamins are more likely to suffer hip fractures than are people who ingest modest amounts.
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Catch of the day for cancer researchers
Scientists are using glowing tumor cells inside zebrafish to study how cancer spreads.
- Earth
Sexual Hang-Up: Fish hormones change when oxygen is scarce
Oxygen deprivation—an escalating problem in freshwater ecosystems worldwide—tampers with sex hormones in carp and might underlie the decline in some fish and amphibian species.
- Earth
Killer Crater: Shuttle-borne radar detects remnant of dino-killing impact
Radar images gathered during a flight of the space shuttle Endeavour 3 years ago show the subtle topography related to the impact of an asteroid or comet that may have wiped out the dinosaurs 65 million years ago.
- Animals
Fish That Decorate: Females prefer nests with pizzazz
If scientists give foil strips to male stickleback fish, the fellows carry them back to their nests for decoration, and it turns out that females seem to like guys with lots of shiny stuff.
