All Things Considered

President Obama has announced an ambitious plan to explore the mysteries of the human brain.

In a speech Tuesday, Obama said he will ask Congress for $100 million in 2014 to "better understand how we think and how we learn and how we remember." Other goals include finding new treatments for Alzheimer's disease, epilepsy and traumatic brain injury.

More than 1 million people are dying prematurely every year from air pollution in China, according to a new analysis.

"This is the highest toll in the world and it really reflects the very high levels of air pollution that exist in China today," says Robert O'Keefe of the Health Effects Institute in Boston, who presented the findings in Beijing this week.

Tuareg bands are natural rockers. These desert nomads have a history of harsh physical challenges, long separations, nostalgia and rebellion — elements that give their music gritty authenticity. There's something about their ambling, tuneful songs that fits perfectly with the bite and snarl of electric guitars.

The devastating drought in the Midwest last summer is a story often told by the numbers, with statistics on large crop failures, days without rain and thousands of parched acres.

This story is also about a tree — a bur oak in rural Columbia, Mo., that everyone calls "The Big Tree." Although it's survived all kinds of punishments during its 350 years on the prairie, last year's record drought was especially tough.