"If you hear a dinosaur/Knocking loudly on your door,/Through the keyhole firmly say/'Nobody is home today.'/If the bell should start to ring,/Tell the beast, 'No visiting.'/If you see there's more than one,/Turn around and start to run." Here's a collection of poems about every kind of dinosaur you can think of--including the real reason why they all disappeared."If you hear a dinosaur/Knocking loudly on your door,/Through the keyhole firmly say/'Nobody is home today.'/If the bell should start to ring,/Tell the beast, 'No visiting.'/If you see there's more than one,/Turn around and start to run." Here's a collection of poems about every kind of dinosaur you can think of--including the real reason why they all disappeared.