Search Results for: Vertebrates
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1,505 results
- Life
Rock-hard evidence
Newly discovered dinosaur tracks, the first ever reported from the Arabia Peninsula, indicate that a part of the now-arid region was teeming with dinosaurs about 150 million years ago.
- Humans
Otters and oil: Problems remain
The behavior of Alaska's southern sea otters may unwittingly expose them to toxic oil-spill residues.
- Life
Earliest whales gave birth on land
Recently discovered fossils of a protowhale help fill in gaps in the land-to-water transition.
- Life
Morse Toad: When amphibians tap their toes
Toe wiggling creates motions, vibrations that get potential prey moving.
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I have heard that whales evolved millions of years ago into their present form, including their very large brains. We humans must be relatively recent in terms of our brain structures. Are there data concerning evolutionary development in whales? Matthew KabriskyDayton, Ohio “Learning to Listen: How some vertebrates evolved biological sonar” (SN: 5/14/05, p. 314) […]
- Paleontology
The first matrushka
A newly found fossil preserves one creature inside another that lies nestled inside yet another, a Paleozoic version of the Russian nesting dolls known as matrushkas.
- Life
Parenthood: Male sharks need not apply
A second case of a virgin shark birth suggests some female sharks may be able to reproduce without males.
- Paleontology
Walking tall
Some types of the largest flying reptiles ever known were well adapted to life on the ground.
- Health & Medicine
The two faces of prion proteins
Scientists are learning more about the protein behind mad cow and Creutzfeldt-Jakob disease, including how to interfere with the protein’s production in the brains of mice.
- Paleontology
Flying Deaf? Earliest bats probably didn’t echolocate
Fossils of a cardinal-sized creature recently unearthed in western Wyoming suggest that primitive bats developed the ability to fly before they could track their prey with biological sonar.
- Paleontology
Ancient burrows
Triassic-era sediments unearthed in Antarctica reveal the well-preserved lair of a four-legged, mammal-like reptile.
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