Last week, Gary Dahl, creator of the Pet Rock, passed away at the age of 78. For those of you who are too young to remember them, Pet Rocks were small, roughly egg-shaped stones sold, nestled in straw, in small cardboard boxes (complete with air holes) for $3.95. They came with an instruction manual for the care of the Pet Rock. Gary Dahl began marketing them in late 1975. And they became an enormous, instant cultural sensation. Dahl quickly sold over a million and a half Pet Rocks. In its typically thorough obituary for Gary Dahl, published on March 31 Read more