'World's smallest' snowman is thinner than a human hair

This, according to scientists at Canada's Western University, is the world's smallest snowman.

The school's nanofabrication lab claims it is three microns tall, which is around 0.003mm.

For reference, a human hair is about 75 microns thick (0.075mm).

Their effort has taken a full 0.097mm off the previous record and can only be seen with the human eye using an electron microscope.

The tiny snowman hasn't got any pals yet

Despite having the appearance of a traditional snowman, it would have been too tricky to build such a small figure using real snow so they went for three 0.9 micron silica spheres.

Silica, which is a mineral found in things like sand or quartz, is a mix of silicon and oxygen.

Obviously it would have been a fiddly job to do by hand so the three chunks were stacked using electron beam lithography.

Also, who needs coal for eyes when you've got a focused ion beam to dig out facial features?

A carrot nose and sticks for arms are also out of the window - they were replaced by tiny pieces of platinum.

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