False memory, acing a test, and killer space rocks

You think you remember stuff from years ago, you'd even swear to it. But your memory is f-ing with you.

Also, when your kid scores a 100% on a test, is that always a good thing? Maybe not.

And for some reason our planet is more at risk today of getting creamed by a space rock.

Thanks to the Independent and Guiliana Mazzoni for the memory piece.

Cheers to Cody Kommers and Scientific American for the story on grades.

And thanks to Seth Borenstein and US News and World Report for the scary bit about killer rocks from space.

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