Any domino can knock over another object up to 1.5x its size. The 32nd object would be big enough to knock over the Empire State Building.
18
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13