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AIDS pandemic origin was 1920s Kinshasa, says study
Between the 1920s and 1950s, a perfect storm of population growth, sex and railway links let HIV to spread from Kinshasa in Africa, across the globe.
October 6, 2014
Wind and solar energy capacity catching with nuclear power
The Worldwatch Institute quantifies the steady decline of nuclear energy’s share of global power production, and renewable energy's increased share.
September 30, 2014
Video: New 3D look at brain circuitry
New imaging technology provides unprecedented 3-D views of an intact brain's neural structure and its vast internal connections.
September 29, 2014
World population unlikely to stabilize in this century
Experts used “scenarios” to suggest global human population will stabilize around 9 billion by about 2050. A new statistical analysis tells a different story.
September 29, 2014
Why is Antarctic sea ice increasing as Arctic sea ice declines?
Arctic sea ice continued its long-term decline in 2014. Meanwhile, sea ice on the other side of the planet was headed in the opposite direction. Why?
September 27, 2014
History of storm surge in Florida strongly underestimated
Northwestern Florida was thought to get hit by a hurricane with a five-meter (16-foot) storm surge every 400 years. In fact, the frequency may be every 40 years.
September 23, 2014
June through August 2014 hottest ever recorded globally
June through August 2014 is the warmest period recorded since record keeping began in 1880, NOAA says. Also, the warmest August since 1880.
September 19, 2014
Chimpanzee wars not due to human influence, says study
Lethal aggression is something that chimpanzees naturally do, the study says, regardless of whether human impacts are high or low
September 19, 2014
Tornado Alley storm season starting and ending earlier
Peak tornado activity typically occurs in the region from early May to early July. It has moved an average of seven days earlier over the past six decades.
September 17, 2014
A push for climbing reform after Sherpa deaths on Everest
In the wake of the deaths of 16 Nepalese guides on Mount Everest in April 2014, many groups push for reform of climbing expedition practices.
September 16, 2014
