Things that make you go "Hmmmm…"

[Xyzzy]

http://web.mit.edu/persci/people/ade...sion.html?gray

[paulunderwood]

Yep, incredibly both squares are RGB 47% 47% 47%

[cheesehead]

Originally Posted by Xyzzy

http://web.mit.edu/persci/people/ade...sion.html?gray

On a related note (so to speak): http://en.wikipedia.org/wiki/Shepard_Tone

[cheesehead]

http://www.washingtonpost.com/wp-dyn...101801663.html

[Fusion_power]

Try this one for some unscientific science. Caution advised.

http://www.fixedearth.com/

[Xyzzy]

http://www.chemistry.org/portal/a/c/...inum_arch.html

[Xyzzy]

http://www.havidol.com/

[petrw1]

http://members.shaw.ca/b.bogdan/caramilk/cadbury.htm

[cheesehead]

http://news.yahoo.com/s/csm/20070316...s.Ipdaqjr8B2YD

[cheesehead]

Originally Posted by ewmayer

"The strategy is to blur the boundary between pedestrians and automobiles..."

"The whole notion behind psychological traffic calming is to give drivers responsibility for the speed they choose"

"... traffic speeds fell by up to 8 miles per hour, and the speeds of faster drivers by up to 12 mph. The reasons are both counterintuitive and compelling
...
the driver makes his own choice to slow down, rather than just being instructed to slow down in what looks like a safe environment."

"A growing body of American transportation research is consistent with psychological traffic calming principles. ..."

[rogue]

http://en.wikipedia.org/wiki/Category:Optical_illusions