It's Woof Woof Wednesday, and pup Astrid wants to show off her new collar.
Did you know that the pet door is an invention often attributed to Isaac Newton? Then again, this assertion is also often likened to an urban legend. Either way, according to the legend that Isaac Newton invented the pet door, it's said he cut holes in his door for his cats to pass through. One version of this story even goes as far as to indicate that he did this in order to keep his cat from requiring the door to his darkroom be opened fully, which could ruin light-sensitive experiments. This same version of the story surrounding the invention of the pet door also indicates that Isaac Newton's cat supposedly named Spithead was the one who would open the door to his darkroom. Do you think even a lick of this is true? Either way, it's an interesting thought.