News

Health & Medicine

One more reason to worry

A single dose of the AIDS drug nevirapine, given to mothers to help prevent them from infecting their children during birth, may be enough to prod the virus to develop drug resistance.

Physics

Spectral atom rings in

Electron waves can generate a phantom atom when a real atom is placed at the right spot inside an elliptical quantum corral, or loop of atoms, arranged on a surface.

Humans

Treaty Nears on Gene-Altered Exports

In an effort to help preserve biodiversity, negotiators from 130 nations crafted rules of conduct for international trade in living, genetically engineered organisms.

Anthropology

Drowned land holds clue to first Americans

A map of a now-flooded region charts the path that Asians may have taken to first reach the Americas.

Physics

Black hole recipe: Slow light, swirl atoms

Whirling clouds of atoms may swallow light the way black holes do, possibly giving scientists a way to test the general theory of relativity in the lab, not just in outer space.

Health & Medicine

Novel diabetes strain has rapid onset

Japanese researchers have confirmed that some patients with type 1 diabetes have a novel form of the disease that's not caused by immune cells attacking the pancreas.

Earth

DDT treatment turns male fish into mothers

Injecting into fish eggs an estrogen-mimicking form of the pesticide DDT transforms genetically male medaka fish into apparent females able to lay eggs that produce young.

Animals

Bees log flight distances, train with maps

After decades of work, scientists crack two problems of how bees navigate: reading bee odometers and mapping training flights.

Astronomy

Milky Way gets a new layer

Astronomers propose that 150 billion corpses of sunlike stars may blanket the visible disk of the galaxy.

Plants

Why tulips can’t dance

An elliptical stem gives daffodils an unusual liveliness in the wind compared with tulips.