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Summertime ice in the Arctic Ocean has been in quick retreat. There's a lot of uncertainty about how quickly it will melt away entirely in the summertime. Estimates range from 2013 to beyond 2100. The uncertainty is explained by the science behind the phenomenon of melting.

As President Barack Obama prepares to enter a second term, he faces a host of foreign policy issues. Syria presents an immediate crisis, China poses a strategic challenge and tensions with Iran continue to escalate.

I had been at KPBS barely a month when I was given a directive to focus on teen violence. More specifically, to plan an event that could help young people learn ways to handle aggressive behavior. With no other instructions, and little knowledge of how to achieve this, it seemed to be a very tall order. I had a bare-bones budget and a lofty goal. Yet somehow this event happened in a big and meaningful way.

Tom MacMaster said he created an online character and suddenly he didn't know how to end it. In an interview with NPR, he said that if his creation of "Gay Girl In Damascus" put into question other Mideast bloggers, he "feels awful."

Workers were forced to evacuate from Japan's Fukushima Dai-ichi nuclear plant Monday, putting efforts to restore the plant's cooling systems on hold. Residents and officials also face concerns about radiation-tainted food and water, while essential supplies remain scarce across northeastern Japan.

The debate over whether or not to raise San Diego’s sales tax may be dividing the city, but it’s bringing two prominent politicians together.

Mel Gibson's movie "Apocalypto" is bringing attention to Mayan culture and history. A new science fiction novel "Mayan Mars" combines Mayan history, the end of the world and travel to Mars. We speak w

Next month, the people of Southern Sudan will choose whether to break up Africa's biggest state and create the world's newest nation. Much is at stake, including most of Sudan's oil reserves and -- potentially -- peace in one of the continent's more volatile countries.

The pea aphid, a tiny bug that comes in shades of red and green, is the first known critter in the animal kingdom to create its own color compounds, or carotenoids. Other animals get their color by eating various colorful plants. But aphids are able to produce their own because they stole DNA from fungi long ago.

Culture Lust contributor Randy Dotinga is an avid reader who's made the switch from hardcovers to reading entire books on his phone. Dotinga makes the case for reading on a tiny, hand-held screen.