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U.S. success with covert efforts like cyberattacks is making Iran's leaders nervous, analysts say.

The nationwide movement might target Wall Street and financial institutions, but it's playing out on the streets of big cities across America. This presents particular challenges for mayors, who are struggling to strike a balance between civil rights and law and order.

Robert Poole, a historian at the University of Cumbria in the United Kingdom and author of Earthrise: How Man First Saw the Earth, takes a journey through time and space, exploring images of the Earth through the ages.

The financial crisis gripping Greece is having a major impact on the country's young people. A two-tier labor market that favors the older generation and draconian austerity measures have triggered a record high jobless rate among those under 35.

UCSD beat UCLA and more than 200 other graduate schools for the top five doctoral programs in the nation.

Vaccination campaigns have erased polio in almost every country in the world, but the disease persists in Afghanistan, Pakistan, and Nigeria. Obstacles in each country, including religious extremism, difficult terrain and transient populations, make eradication efforts difficult.

Superheroes and fans have packed up and left town, as another Comic-Con comes to a close. The world’s largest pop culture convention drew big crowds again this year, including many men and women with disabilities. KPBS arts reporter Angela Carone says comics’ relatable characters and Comic-Con’s disabled services are part of the appeal.

When it comes to climate change, some look at the facts presented and see a coming catastrophe, while others see a hoax. This difference in interpretation, social scientists say, has more to do with each individual's existing outlook than with the facts.

The Transportation Security Administration plans to install 150 new whole-body scanners in airports. Opponents of the machines say they violate passengers' privacy, but supporters say they actually aren't all that invasive — and they're our best weapon against future attacks.

Biologist Scott Hatch says the seabirds on an island in Alaska's Prince William Sound show a surprising amount of flexibility in how they respond to the changing environment. Well-fed kittiwakes produced more offspring, while those that didn't breed lived longer.