Binary adder will give you slivers - Hack a Day

http://hackaday.com/2009/10/13/binary-adder-will-give-you-slivers/

Haptic Halluc 2 - Hack a Day

http://hackaday.com/2009/10/13/haptic-halluc-2/

Letters of Note: TO A TOP SCIENTIST

http://www.lettersofnote.com/2009/09/to-top-scientist.html
via BoingBoing

Beau Lotto: Optical illusions show how we see | Video on TED.com

http://www.ted.com/talks/beau_lotto_optical_illusions_show_how_we_see.html

David Hanson: Robots that "show emotion" | Video on TED.com

http://www.ted.com/talks/david_hanson_robots_that_relate_to_you.html