The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
The colossal squid has the largest eyes in the world.
4
Cats recognise the voice of their owner, but never evolved to care.
22
Bats sleep 18-20 hours per day.
5
The CIA once spent $20 million on a cat equipped with gear to spy on the Soviets, but it was hit by a taxi.
328