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Families wait for hours to register at the Yida refugee camp in South Sudan along the northern border in early July. Within a few weeks, the population of the camp more than doubled, leading to shortages of food, water and medicine.

Dire Health Conditions In South Sudan Prompt Airdrops

More than 100,000 people have fled to refugee camps in South Sudan to escape fighting in Sudan and find food. Heavy rains have depleted supplies and raised mortality rates above emergency levels. The United Nations has launched emergency airdrops of food to help the refugees.

A PET scan of the brain of a person with Alzheimer's disease.

Failure Of Lilly Drug Is Latest Alzheimer's Setback

It's the latest setback in a field marked by failure. Earlier this month, Pfizer and Johnson & Johnson said they were dropping development of a similar experimental drug after big clinical studies showed it wasn't working.

Bill Armstrong, fire manager for the Santa Fe National Forest in New Mexico, is a firm believer in thinning forests and returning them to a natural burn cycle to avoid megafires.

Is It Too Late To Defuse The Danger Of Megafires?

Millions of acres of forest in the Southwest are overgrown — and ripe to ignite as climate change intensifies drought and heat. Selective thinning and other efforts aim to reduce the risk of catastrophic fires, but those efforts may not be enough to overcome ever-bigger, ever-hotter fires.

'Carbon Nation' Tackles Climate Change, By Ignoring It

The documentary film 'Carbon Nation' aims to get viewers to make more climate-friendly energy choices but director Peter Blyck says he isn't trying to change anyone's views on climate change. Byck discusses the film, and his "common sense" approach to curbing CO2 emissions.

David Eagleman Gets Inside Our Heads

In his book Incognito: The Secret Lives of the Brain neuroscientist David Eagleman says "most of what we do and think and feel is not under our conscious control." Eagleman discusses the book, and his latest research on the possible link between time perception and schizophrenia.

Barrio Basketball In El Paso, Texas

For just $1, the Basketball in the Barrio camp teaches kids crossover dribbling, along with peace and harmony.

United States Anti-Doping Agency Chief Executive Officer Travis Tygart, right, during a subcommittee hearing on drug use in sports in 2008.

Anti-Doping Chief: Armstrong Knows Truth, Sticking To 'Baseless Soundbites'

Travis Tygart says the USADA uncovered one of the "most sophisticated drug conspiracies we've ever seen." And that reason why Lance Armstrong decided not to fight the charges is obvious.

Jerry Nelson and the character he brought to life, Count von Count.

Jerry Nelson, Puppeteer For Sesame Street's Count Von Count, Is Dead

Besides voicing the Count, Nelson originated such Muppet characters as Mr. Snuffleupagus and Gobo Fraggle.

The information farmers are getting from Twitter can help them decide how and when to market their grain.

Farmers Waiting Out The Drought Tune Into Twitter

Farmers are getting real-time news they can use, and moral support, from other farmers on Twitter. The social networking tool is especially important in this year's severe drought, which is affecting most of the country.

Like Lynyrd Skynyrd before it, Blackberry Smoke turns Southern music forms into radio-ready singalongs.

Blackberry Smoke: Life In A Small Town

Like Lynyrd Skynyrd before it, the band turns Southern music forms into radio-ready singalongs.

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