Search Results for: Vertebrates
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1,541 results
1,541 results for: Vertebrates
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Air’s oxygen content constrains insect growth
The size to which insects grow is limited by their need to route oxygen to tissues in their legs.
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Quirky Cardiology: Crocs’ hearts may aid their digestion
The crocodile's ability to direct oxygen-depleted blood to its stomach may be instrumental in digesting large, bony meals.
- Chemistry
Whiff Weapon: Pheromone might control invasive sea lampreys
Researchers have characterized the primary components of the migratory pheromone that guides sea lampreys to suitable spawning areas.
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Genome Buzz: Honeybee DNA raises social questions
Scientists have officially unveiled the DNA code of the western honeybee, the first genome to be sequenced for an animal with ultrastratified societies.
- Paleontology
Rodents tell a geologic tale
The sudden appearance of many new species of rodents in Chile about 18 million years ago may have marked the rise of the southern Andes.
- Paleontology
DNA analysis reveals extinct type of wolf
New genetic analyses of the remains of gray wolves found in Alaska indicate that a distinct subpopulation of that species disappeared at the end of the last ice age, possibly because of its dietary habits.
- Humans
European chemical legislation adopted
A groundbreaking chemical law, passed by the European Parliament on Dec. 13, is set to fundamentally change the evaluation and production of chemicals used throughout the European Union. The Registration, Evaluation and Authorization of Chemicals (REACH) law, which will go into effect in June 2007, takes a different approach than current U.S. policy does. It […]
- Animals
New candidates for smallest vertebrate
Two recent scientific papers have described fish species that could, depending on the definition, be the world's smallest known vertebrate.
- Paleontology
Ancestor of Kings: Early progenitor of T. rex had a crest
Paleontologists have unearthed remains of the oldest known dinosaur of the tyrannosaur clan.
- Animals
Can You Hear Me Now? Frogs in roaring streams use ultrasonic calls
A small frog living beside Chinese hot springs may be the first amphibian known to use ultrasound in its calls.
- Paleontology
Dinosaur neck size reaches new extreme
Scientists have unearthed remains of a massive, plant-eating dinosaur whose neck may have been twice as long as its body.
- Life
Pterosaurs might have soared 10,000 miles nonstop
Flight analysis suggests ancient reptiles were record setters.
