Seeming as benign as Casper the Friendly Ghost, these gleaming, motorized white forms welcomed visitors to the Pepsi-Cola Pavilion at the Expo '70 in Osaka.

WSJ: Ghosts in the Machine | New Museum | Beyond Human | By Kristin M. Jones

He typed in the name Gerhard Casper, and instead of getting results for Casper the Friendly Ghost, as he did on AltaVista, up popped links to Gerhard Casper the president of Stanford.

NEWYORKER: Get Rich U.