Two studies of vacuums suggest that the speed of light in a vacuum might fluctuate, pointing the way to a quantum mechanical explanation for why the speed of light and other so-called constants are what they are.
Jane Goodall apologizes: The famous primate researcher apologizes because her some passages were lifted from elsewhere. Jane Goodall and the publisher of "Seeds of Hope" announced a delay in the book's release.
Almost half of the world gets its water from the Himalayas and other high mountains, but little is known about how global warming will affect these sources. A team of scientists ventured to the roof of the world to investigate.
The most detailed map ever made of the afterglow of the big bang has been unveiled, using data from the Planck space telescope. It largely confirms cosmologists' narrative for the birth of the universe, with a few adjustments.
A new study indicates that massive volcanic activity and the resultant climate change some 200 million years ago were behind the widespread extinction of land and sea species that made way for the rise of dinosaurs.
Amazon.com founder Jeff Bezos and his team have recovered from the ocean floor what were believed two of the long-lost Saturn V engines from the Apollo 11 mission, which sent the first man to the moon more than 40 years ago.