Fark

From the news item "If a crow doesn't trust you, it won't forget your face" in the January 30 issue of Australian "New Scientist" (page 14):

"...John Marzluff at the University Of Washington in Seattle and colleagues donned a rubber caveman mask and then captured and ringed ... wild American Crows.

"If the crows were later approached by someone wearing the same mask, they loudly scolded the intruder. Yet the birds ignored the same person if they were wearing a [different] mask...

"The crows' antipathy to the caveman mask has lasted more than three years, even though they had no further bad experiences with people wearing it."

Quoted without permission, but I recommend tracking down the ish for yourself. There's also a beaut article on using Phobos as a stepping stone to Mars.