I'm pretty sure, pet doors weren't created for this purpose.
Link via the always wonderful Neatorama.
Mangesh co-founded mental_floss in 2001 and previously served as Editor-in-Chief of the magazine. He's currently Chief Creative Officer.
View the discussion thread.
Fredric Baur invented the Pringles can. When he died in 2008, his ashes were buried in one.
5 Questions: Zynga Games
Singles, Reality Bites, or Empire Records?