News
- Health & Medicine
Metal’s Mayhem: Cadmium mimics estrogen’s effects, thwarts DNA repair
Cadmium causes endocrine disruption by mimicking estrogen in rats and also thwarts routine DNA repair, causing mutations, two studies show.
- Materials Science
Tiny Labs: Polymers on silicon chip catch, release proteins
In a step toward a new laboratory-on-a-chip technology, researchers have grown a dense polymer film on a silicon wafer that takes up and releases proteins on command.
- Animals
City Song: Birds sing higher near urban traffic
Birds in noisier city spots tend to sing at a higher pitch than do members of the same species in quieter neighborhoods.
- Earth
Protective Blanket: Atmosphere blocks many small stony asteroids
A new computer model that more realistically simulates the aerodynamic forces on an object as it passes through Earth’s atmosphere suggests that the thin layer of air is an even better shield than previously thought.
- Health & Medicine
Split Ends: Cancers follow shrinkage of chromosomes’ tips
Genetic tabs called telomeres, which normally protect the ends of chromosomes, become undersized in many tissues that later turn cancerous, new studies in people show.
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Where’s Poppa? Absent dads linked to early sex by daughters
Long-term studies conducted in the United States and New Zealand indicate that girls are particularly likely to engage in sexual activity before age 16 and to get pregnant as teenagers if they grew up in families without a father present.
- Plants
Stout Potatoes: Armed with a new gene, spuds fend off blight
Splicing a gene from a blight-resistant wild potato into varieties used for consumption could lead to blight immunity for all spuds.
- Tech
Counting calories on the road
People are programmed to spend about the same number of calories per day—roughly the energy of one hot dog—on daily travel, according to new analysis of British transportation statistics.
- Astronomy
Revved-up antics of a pulsar jet
Flailing like an out-of-control fire hose, a mammoth jet of charged particles gushing from a collapsed star is varying its shape and brightness more rapidly than any other jet known in the heavens.
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- Health & Medicine
Viral protein could help liver therapy
Researchers have developed a method of delivering gene therapies to targeted cells that makes use of viral proteins rather than whole virus particles.
- Chemistry
An inexpensive catalyst generates hydrogen
A new, inexpensive catalyst could make hydrogen generation cleaner.
