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A famous researcher slams popular ideas in a controversial new paper.

Airs Wednesday, June 29, 2011 at 10 p.m. on KPBS TV

We spend roughly a third of our lives asleep, but know very little about what happens while we slumber. In Dreamland, journalist David Randall presents what he's learned about sleep deprivation, dream interpretation and the explanations for his own bizarre sleep habits.

Many things raise the risk for cancer, including exposure to various toxins and radiation. But our knowledge about the range of chemicals and compounds that can trigger cancer is limited.

Scientists say the asteroid began coming apart early last year. They theorize sunlight is slowing pulling the asteroid apart by increasing its rotation.

The last time Venezuela tried for a seat in 2006, the United States successfully lobbied against it. The U.S. expressed disappointment about Venezuela's inclusion.

Advocates say tools that cloak online identities are needed to protect activists. Prosecutors say they hinder efforts to police all kinds of crime, from child pornography to illegal gun sales.

Tuesday, senators begin working out the details of a bipartisan update to the No Child Left Behind education law. The proposed revision would give states more control over school accountability.

Along with dozens of other Republican lawmakers, a local member of Congress is under fire from President Obama's non-profit over his global warming beliefs.

Scientists still don't fully understand what's going on inside the human brain. But thanks to a robust White House initiative, local researchers could help get us closer to answering that basic question.