Erasing memories, biggest T-Rex and the smell of Parkinson's, Saturn's tiny ring moons, Google glass helps autistic kids and a supervolcano eruption

Quirks and Quarks

How to remember to forget - the new science of erasing memories; Big, old and banged-up - Canada is home to the world's largest Tyrannosaurus Rex; A woman who can smell Parkinson's disease could hold the key to early diagnosis; Meet the odd little moons that interact with Saturn's spectacular rings; Google glasses could help kids with autism read emotional cues in people's faces; What would happen if the Yellowstone supervolcano exploded?

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