The octopus does not have a blind spot.
273
Cats and dogs can hear ultrasound.
350
Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
11
One in three dog owners say they have talked to their pets on the phone.
427
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Ants have tiny magnetic compasses in their antennae which help them navigate.
9