Related:

• How many dinosaurs -- does it take to change a light bulb?
  It takes thousands of dinosaurs millions of years....
• There are many intelligent species in the universe. They all have cats.
• There are many intelligent species in the universe. They are all owned by cats.
• There are many intelligent species in the universe. They all own cats.
• There are many intelligent species in the universe, and they all own cats.
• How many humans -- does it take to change a light bulb?
  Not sure; I only know it takes only one to press the button which obliterates them all....
• How many software engineers -- does it take to change a light bulb?
  Of course, as everyone knows, just five years ago all it took was a bunch of kids in a garage in Palo Alto to change a light bulb....
• CATS ARE IT!