Revealed - the mystery of Rudolph’s nose

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Paris -

Rudolph the Red-Nosed Reindeer's snout has been immortalised in movies, books and song.

But until now, no-one has offered a scientific explanation for the glow that allows the world's most famous antlered herbivore to guide Santa's sleigh through the night before Christmas.

In a study released on Monday, researchers in the Netherlands and Norway used a hand-held microscope to examine the nasal lining of five healthy humans, two reindeer and a sixth person with a non-cancerous nasal growth.

Reindeer noses have 25 percent more blood vessels than human noses, according to the tongue-in-cheek investigation, published by the British Medical Journal (BMJ) in its Christmas edition.

The tiny blood vessels provide plentiful oxygen-carrying cells and help control the body's temperature, showed their findings, which were backed by an infrared image of a reindeer after exercise.

“Rudolph's nose is red because it is richly supplied with red blood cells, comprises a highly dense micro-circulation, and is anatomically and physiologically adapted for reindeer to carry out their flying duties for Santa Claus,” the paper observes.

Rudolph's round-the-world feat has been closely scrutinised by physicists.

In order to deliver presents to children in around 100 million homes where the Santa tradition is observed, he would have to travel at around 1 000 kilometres per second, they estimate.

At such speeds, the reindeer, Santa and the sleigh would be vapourised by friction with the air, along with the gifts and any little elvish helpers who came along for the ride.

Rudolph would need to deploy an ion shield to protect them, or exploit loopholes in the space-time continuum so that they travelled between dimensions in order to deliver the presents on time. - Sapa-AFP

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