733 results
- Ecosystems
Frogs leapt before they landed
Jumping preceded mastery of the touchdown in amphibian evolution, a new study suggests.
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- Life
A salty tail
Just adding sodium can stimulate limb regrowth in tadpoles, a study finds, raising the possibility that human tissue might respond to relatively simple treatment.
- Animals
A little climate change goes a long way in the tropics
In hot places, even minor warming could rev up metabolism in animals that don’t generate their own heat, a new analysis suggests.
- Life
Removing a barrier to regrowing organs
Depleting proteins that prevent cancer allowed heart cells to regenerate in mouse experiments.
- Earth
Frogs: Weed killer creates real Mr. Moms
Several months back, a Berkeley undergraduate began witnessing distinctly odd behavior in frogs she was caring for in the lab. At about 18-months old, some frisky guys began regularly mounting tank mates, as if to copulate. Except that their chosen partner was invariably male. He had to be. Because genetically, every animal in the tank was male.
- Life
Just warm enough
Mammals may have evolved a characteristic body temperature to avoid fungal infections without burning too hot.
- Earth
Possible snake shortage looms
Declines among species in Europe and Africa raise herpetologists’ worries of widespread population losses.
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Dawn of the Dinosaurs
Paleontologists probe the majestic reptiles’ origin and rise.
- Earth
Atrazine paper’s challenge: Who’s responsible for accuracy?
As a new critique of a review paper on atrazine suggests, some papers may simply overtax a journal’s fact-vetting enterprise. Which would be bad for science. And bad for society.
- Life
Evolutionary genetic relationships coming into focus
Researchers have filled in about 40 percent of the tree of life for mammals and birds, but other vertebrates lag behind.
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Weed Killer in the Crosshairs
Concerns prompt reexamination of atrazine’s safety.
