Life
We summarize the week's scientific breakthroughs every Thursday.
- Animals
Ultrasound alarms by ground squirrels
Richardson's ground squirrels may occasionally use ultrasound when calling out in response to a disturbance.
- Animals
Why does a buddy help another male flirt?
The sidekick male in the two-bird courtship display of lance-tailed manakins has to leave when the mating starts but may reap delayed benefits in real estate and performance practice.
- Animals
Farmer ant species may have lost all its males
A fungus-growing ant may be the first ant species known to have no power of sexual reproduction.
- Animals
Jumping spiders buzz, thump when dancing
Some jumping spiders, long considered visually oriented animals, turn out to utilize seismic communication for a successful courtship.
- Ecosystems
More on California’s rogue seaweed
Scientists have obtained genetic confirmation of the assumption that a newfound rogue alga in California waters is the same strain that has been smothering seafloor communities in the Mediterranean.
- Animals
Hot Bother: Ground squirrels taunt in infrared
California ground squirrels broadcast an infrared signal when confronting a rattlesnake.
- Animals
Thoroughly Modern Migrants
Butterflies and moths are causing scientists to devise a broader definition of migration and this has raised some old questions in new ways.
- Paleontology
Calling all orthodontists. . .
Researchers have unearthed fossils of a theropod dinosaur whose front teeth grew almost directly forward, which sets it apart from all other related species.
- Paleontology
Allosaurus as a Jurassic headbanger
The skull of the carnivorous dinosaur Allosaurus fragilis can resist levels of stress much higher than those expected from chewing, which may provide insight into the animal's method of attacking its prey.
- Paleontology
The last ice age wasn’t totally icy
Radiocarbon dating of fossils taken from caves on islands along Alaska's southeastern coast suggest that at least a portion of the area remained ice-free during the last ice age.
- Paleontology
Did ancient wildfire end in barbecue?
Small pieces of large bones and petrified wood that show distinct signs of being burned may be evidence of a 74-million-year-old wildfire in central Wyoming.
- Paleontology
Fossil Fingerprints: Rare earths tie bones to burial ground
The soil in which fossilization occurs leaves a chemical imprint on the bones, suggesting that scientists can use this soil signature to identify more precisely a fossil's original home.
