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Eruptions Cleared Path for Dinosaurs
The world's largest known set of volcanic eruptions may have killed
off much of the existing life in the Triassic period.
Self cells ease Parkinson's in monkeys
Cells from the carotid-body glands in the neck, transplanted into the
brains of monkeys with Parkinson's disease, facilitate the production
of dopamine and lessen muscle rigidity and other symptoms of the disease.
Souping up and other tricks produce
satiety
Strategies such as adding water to a dish to make it more like a soup
can fool a person into feeling satisfied by fewer calories than normal.
Farmer ants have bacterial farmhands
Ants that grow gardens turn out to be aided by a weed-killing species
that no one noticed despite a century of study.
African fossils flesh out humanity's past
Fossils from a new species in the human evolutionary family date to
2.5 million years ago, and animal bones found near them show evidence
of the earliest known butchery.
Nutritionists debate soy's health benefits
Although soy seems to be an effective cancer fighter, a soybean component
called genistein, which has been touted for its health benefits, is
not living up to expectations.
Do supernovas generate gamma-ray bursts?
Astronomers are beginning to home in on the relics of the explosions
believed to generate gamma-ray bursts.
Superplastic metals stretch to a new low
Metals can be stretched and molded at temperatures hundreds of degrees
lower than previously thought.
Well-Done Research
New recipes for making seriously browned meats less of a cancer risk
Adding fruit to meat, using certain marinades, or drinking beer to accompany
a meat dish show promise in quashing the carcinogens that can form in
meats as they cook.
Beyond Vancomycin
Understanding an antibiotic of last resort may lead to new weapons
against deadly bacteria
The discovery of bacterial strains resistant to the drug vancomycin
has forced researchers to develop new strategies for combating infections
that occur in patients after surgery.
Anthropology
Robust about-face
A researcher proposes that most of the weird facial traits of a species
in the human evolutionary family known as robust australopithecus arose
as developmental by-products of an unusual set of teeth.
Redrawing the human line
Some scientists want to expel the 2-million-year-old fossil species
called Homo habilis and Homo rudolfensis from the Homo
genus.
Biology
A second living-fossil species?
The Indonesian coelacanths reported in 1998 may be a new fish species,
different from the only other population known of these living fossils.
Long-sought migration trigger stinks
One of the long-sought chemical triggers for the migration of an aquatic
species may be TMA, an element of fish odor that signals waterfleas
to swim deeper.
Nuptial balloons: Size doesn't matter
The first analysis of shiny saliva balloons that male dance flies clutch
as courtship gifts shows that bigger isn't always better.
