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Antimatter-Matter Mirror Shows Warp
A new measurement of decays of subatomic particles called kaons answers 35-year-old questions about behavior differences between matter and antimatter.
Marrow transplant fights bone disease
Children born with a hereditary bone disease called osteogenesis imperfecta show improvement when given bone marrow transplants from healthy siblings.
Birds in male harem just yell for a mate
Male bronze-winged jacanas, ruled in a harem by a single female, compete for her attentions by yelling.
Learning may unify distant brain regions
Separate parts of the brain's visual system may forge a close working relationship as people learn the spatial locations of common objects.
Not so sunny weather: When currents go bad
Solving the mystery of a phone outage in 1972 has illuminated new threats from the sun.
Simulations nab protein-folding mistakes
Researchers have developed the first computational model that captures how one protein strand can interfere with the folding of another.
Pregnancy-hormone therapy blocks cancer
In experiments on rats, short-term therapy with hormones that simulate aspects of pregnancy appears to reduce lifelong risk of breast cancer.
Asteroids get solar push toward Earth
A subtle, often overlooked, nongravitational effect may play a key role in kicking asteroids out of their main belt and into the inner solar system.
Census Sampling Confusion
Controversy dogs the use of statistical methods to adjust U.S. population figures
To obtain a more accurate enumeration in the year 2000, the Census Bureau has proposed integrating the results of conventional counting techniques with the results of a large sample survey of the population, but others want to stick with the straight count.
Redefining Dioxins
Once dreaded as industrial poisons, some of these compounds may prove to be natural—even beneficial
Insights into how compounds can act at a cell's so-called dioxin receptor may have therapeutic value.
Biology
Cuckoos beg doggedly to trick hosts
Baby cuckoos, whose small beaks won't stimulate their reed warbler hosts to feed them enough, compensate by calling persistently.
Elephants can die from herpes viruses
Two herpes viruses new to science attack and kill zoo elephants.
Evolution
When antlers grew too large
The Irish elk evolved antlers reaching 3 meters across and weighing 40 kilograms—so big that the animals ran into nutritional problems.
Turtles and crocs: Strange relations
Genetic evidence moves turtles to a new place in the reptile family tree.
Physics
Ghostly magnetism comes from nowhere
The unexpected discovery of magnetism in a calcium-boron material has revived a debate begun in the 1930s about the influence of free-roaming electrons on magnetic traits.
Making magnetism flip twice, by design
Japanese researchers, for the first time, used a theoretical approach to design a novel magnetic material, which they then successfully synthesized.
