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.
The Worldwatch Institute quantifies the steady decline of nuclear energy’s share of global power production, and renewable energy’s increased share.
New imaging technology provides unprecedented 3-D views of an intact brain’s neural structure and its vast internal connections.
Experts used “scenarios” to suggest global human population will stabilize around 9 billion by about 2050. A new statistical analysis tells a different story.
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?
Mass and energy are interchangeable.
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.
Astronomical imagery often figured in the poetry of Pablo Neruda. Today, with the help of Michael West of Maria Mitchell Observatory, we honor that connection.
The Chinese were great students of nature. Autumn is connected in Chinese thought with the direction west, considered to be the direction of dreams and visions.
June through August 2014 is the warmest period recorded since record keeping began in 1880, NOAA says. Also, the warmest August since 1880.