Here's a sound you'd rather not hear out on a hike.
(SOUNDBITE OF A RATTLE)
BLOCK: That's a Prairie Rattlesnake from western South Dakota. Well, there's only one thing worse than a rattlesnake giving you that famous warning, one that gives you no warning at all. That's what's been happening with some rattlesnakes in South Dakota's Black Hills. They have apparently lost their ability to rattle.
As South Dakota Public Broadcasting's Gary Ellenbolt reports, that may be good for those snakes but bad for people.
Rebecca Hall, a veteran of films like Vicky Cristina Barcelona and The Town, is the star of the new surveillance-state thriller Closed Circuit, playing an English barrister charged with monitoring top-secret, closed-to-the-public evidence hearings involving a terrorist bombing.
If you're finding it harder to remember where you put the car keys, the culprit could be a brain protein with a name that's easy to forget: RbAp48.
A shortage of this protein appears to impair our ability to remember things as we age, researchers report in the current issue of Science Translational Medicine. And boosting levels of RbAP48 in aging brains can reverse memory loss, at least in mice, they say.
A federal appeals court has reversed an injunction that kept California's law banning conversion therapy from taking effect. This composite image shows sate Sen. Ted Lieu, left, who introduced the original bill, and David Pickup, a marriage and family therapist who is a plaintiff in the suit against it.
California's pioneering law that prohibits treating young gay people with psychotherapy in an attempt to change their sexual orientation has cleared a constitutional challenge in federal appeals court. The 9th U.S. Circuit Court of Appeals in San Francisco ruled that the ban does not violate essential rights.