Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
The Caspian Sea is also classed as the world's largest lake.
52
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
Jupiter's magnetosphere is the largest single structure inside the Solar System. If you could see it with your eyes, it would appear larger than our full Moon.
8