Addicts' Brains May Be Wired At Birth For Less Self-Control
A study of cocaine addicts finds that they have abnormalities in areas of the brain involved in self-control. And these abnormalities appear to predate any drug abuse.

Tick Tally Reveals Lyme Disease Risk
Researchers counted more than 5,000 ticks to calculate the risk of Lyme disease in the Eastern U.S. Turns out the risk is high in the Northeast and nearly zero in the South.

New Silica Rules Languish In Regulatory Black Hole
Last year it looked like stricter controls would be put in place to limit workers' exposure to dangerous silica dust. But for almost a year, the proposed regulations have been stalled at the White House Office of Management and Budget. Worker safety advocates are growing frustrated, but industry stakeholders say current regulations are sufficient.

'I Wanted To Live': New Depression Drugs Offer Hope For Toughest Cases
The anesthetic and club drug ketamine seems to lift depression symptoms in a matter of hours. But how does it work? Researchers are searching for the answer in an attempt to make a new class of depression medications. "We can take care of a migraine in hours," one researcher asks. "So why do we have to wait weeks or months with depression?"

Invasive Pythons Put Squeeze On Everglades' Animals
Burmese pythons have been slithering around south Florida for decades, but scientists now say the invasive constrictors are so bad, they're eating their way through the swamps. The snakes have decimated populations of mammals like raccoons, possums and white-tailed deer.