Broken Teeth And Fake-umentaries: Another Shark Week Gone By
“The hit summer series was once observed with some respect by serious members of the scientific community. Through the decades, however, it has devolved into a B-movie-style blend of fiction, bad acting, a few facts and potential injuries to sharks.
In some of the shows, real scientists are featured onboard real research vessels at sea. However, their chief priority, beneath flimsy scientific premises, seems always to be landing sweet video footage of sharks biting stuff.”
Glow-in-the-dark sharks have specially adapted eyes, say scientists
“In the “twilight zone” of the deep ocean, strange glowing sharks have evolved eyes that are adapted to see complex patterns of light in the dark, new research reveals.
These bioluminescent sharks have a higher density of light-sensitive cells in their retinas, and some species have even developed other visual adaptations that help them see the glimmering lights they use to signal to each other, find prey and camouflage themselves in this region where little light penetrates, according to a study published today (Aug. 6) in the journal PLOS ONE.”
New Fossil Takes A Bite Out Of Theory That Sharks Barely Evolved
“Sharks have looked more or less the same for hundreds of millions of years. But a newly discovered fossil suggests that under the hood, a modern shark is very different from its ancient ancestors.
The finding, published in the journal Nature, strongly implies that sharks are not the “living fossils” many paleontologists once thought they were. “They have evolved through time to improve upon the basic model,” says John Maisey, a paleontologist at the American Museum of Natural History who helped identify the fossil.”
Ancient And Vulnerable: 25 Percent Of Sharks And Rays Risk Extinction
“There are more than a thousand species of sharks and rays in the world, and nearly a quarter of them are threatened with extinction, according to a new study. That means these ancient types of fish are among the most endangered animals in the world.
“An analysis of shark-tooth weapons from the 19th century reveals that two shark species, the spot-tail and dusky, were once common in the Gilbert Island reefs in the Central Pacific. The sharks are no longer found in the area.”