News
- Health & Medicine
A surprise makes memories wobbly
Drug that interferes with recollection works only when people face the unexpected.
- Life
Antianxiety drugs affect fish, too
Perch swim more and eat faster when exposed to concentrations of an antianxiety medication found in rivers.
- Humans
Newborn babies walk the walk
Infants strut a runway wearing electrodes to show how the walking reflex works.
- Animals
Sea slug carries disposable penis, plus spares
A hermaphroditic gastropod sheds its penis after one use, then uncoils another.
- Health & Medicine
To develop male behavior, rats need immune cells
Research reveals unexpected role for cells called microglia in shaping the brain.
- Health & Medicine
Compound linked to IVF success
Women with high blood concentrations of anti-Müllerian hormone were more likely to conceive and give birth after in vitro fertilization.
- Health & Medicine
U.S. breast-feeding rates up
Between 2000 and 2008, the fraction of women breast-feeding babies increased, as did the fraction breast-feeding for a year.
- Humans
In research, it matters whether you’re a man or a mouse
A study that compares trauma responses of mice with those in people questions the relevance of mouse research to human disease.
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- Life
Ancestors of today’s placental mammals may never have shared the Earth with dinosaurs
A newly constructed family tree dovetails with the fossil record, but differs considerably from previous genetic studies by suggesting that placental mammals emerged after the dinosaur extinction.
- Animals
Compared with rodents, bat species carry more viruses
Viruses that can jump from animals to people may find the flying mammals a fine place to lurk.
- Life
Inflammation feeds E. coli
Inflammation, normally a defense against microbes, may become counterproductive in the gut by feeding disease-causing bacteria.
