Just as our visual system strains to see the vase and the two faces at once, we struggle to conceive of a motion that has a dual motivation: to put and to fetch. A paper by Van de Cruys, Wagemans and ...

The renowned Slydini holds up an empty box for all to see. It is not really a box—just four connected cloth-covered cardboard walls, forming a floppy parallelogram with no bottom or top. Yet when the ...

American Master Ricky Jay was introduced to the art of magic and sleight-of-hand by his grandfather, an amateur magician whose master magician friends became Jay’s mentors. “I’ve been really, really, ...