How to create a wormhole (according to cat physics):
Grab the nearest fur ball you can find. Next.. get bread. Spread a thin layer of butter on it. Experience tells us that the buttered side will always hit the ground first.
Attach the toast to the back of the cat so the non-buttered side is touching the cat. Drop the cat from any height (Cat's Conservation Law says they always land on their feet) ...
An infinite force engine and an anti-gravity engine are created, as the cat can't land on its back and since the buttered toast is on the cat's back, it has to land first.
Somehow.. the cat manages to eat the toast (not so unbelievable considering the fact that cats can bend the laws of physics at will) Cat folds in on itself. You now have a wormhole. Go henceforth and find a gigantic ball of twine.