A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
The Caspian Sea is also classed as the world's largest lake.
52
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
The largest breed of rabbit is the Flemish Giant.
65