"For my PTSD issues, jail is the least therapeutic atmosphere you could ever imagine," says Iraq veteran David Carlson. "You come in one way and you leave three times worse."
Light pollution has increased by 500 percent at Theodore Roosevelt National Park in North Dakota, thanks to nearby oil fields. Stargazers and oilmen are working together to find a solution.
Mars used to be much warmer and wetter than it is today. Scientists are unraveling the mystery of why it dried out.
A summit between leaders of China and Taiwan this Saturday will be the first in more than 60 years. It complicates Taiwan's already high-stakes presidential race.
Engineers at MIT developed an electric, shareable car that would fold to conserve parking spaces. A prototype was made for production in Europe. But why did this promising auto never hit the road?
A genetic engineering technique raises hopes for eliminating diseases, such as malaria. But it is also sparking fears of unintended consequences if delicately balanced ecosystems are disrupted.
Sanders concedes that he trails Hillary Clinton for the Democratic nomination, but also notes that some polls show him doing better than Clinton in matchups against the Republicans.
This is the time of year subsistence farmers clear land by setting fires in the Amazon. They say it's the only way they can make a living, but it's delivering another blow to the rain forest.
A California law will soon require pregnancy centers that oppose abortion to provide notice to their clients of the availability of abortion services in the state. Clinics are crying foul — and suing.
The director's recent comments, in which he described police shootings as "murder," have drawn calls for boycotting his films. They also reveal a bitter fault line in 2016: Who supports the police?