Half of stars lurk outside galaxies
Rocket experiment captures glow attributed to renegade stars in intergalactic space.
Models overestimate Ebola cases
Rate of infection in Liberia seems to plateau, raising questions over the usefulness of models in an outbreak.
A quantum world arising from many ordinary ones
Radical theory proposes that interactions between classical worlds can explain some quantum phenomena.
Physicists see potential dark matter from the Sun
X-ray data hinting at axion particles draw interest and cautionary warnings.
Ebola by the numbers: The size, spread and cost of an outbreak
The Ebola outbreak in West Africa continues to rage, with the number of people infected roughly doubling every 3–4 weeks. More than 8,000 people are thought to have contracted the disease, and almost half of those have died, according to the World Health Organization. Although these estimates are already staggering, the situation on the ground means that not all cases and deaths are being reported, so the true extent is likely to be much greater.
Sea floors host surprise methane-munching microbes
Organisms living in carbonate rock provide a previously unrecognized sink for the greenhouse gas.
Gravity map uncovers sea-floor surprises
Sharpest pictures yet of the ocean basins reveal uncharted volcanoes and other geological wonders.