Chronic stress can lead to heart disease, cancer and other health problems. A study shows it doesn't matter if the stress comes from major life events or minor hassles. Time to take a deep breath?
More than 5,500 firefighters are battling the so-called King Fire in the Sierra Nevada forest area. Some 2,800 people have been evacuated.
The activists plan to stay out of university classrooms this week to protest Beijing's plan to screen candidates for the territory's next chief executive.
Forty-three veterans of Unit 8200, Israel's secretive surveillance organization, say they were directed to spy indiscriminately on Palestinians. Were they using intelligence gathered by the NSA?
Angela Stimpson donated a kidney to a complete stranger. Why did she do it? Researchers found that the brains of Stimpson and other altruists are sensitive to fear and distress in a stranger's face.
The orbital probe will study how the solar wind interacts with the red planet's thin atmosphere.
More than 120 leaders are expected to attend the one-day summit sponsored by the United Nations. They have been instructed to arrive Tuesday with "bold ideas" to slow the rise in global temperatures.
Peshmerga forces say they are still engaged in fierce battles with Islamic State militants. The fighting has triggered a mass exodus of Kurdish refugees into Turkey.
Busy schedules and long hours of training are partly to blame for the ever-shrinking volunteer pool.