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Now how on earth does Rudolph's red nose help him to gallivant around the world on Christmas Eve?

There are some optical benefits of the red nose on a foggy evening, says a study published in Frontiers for Young Minds

Scientists had examined the unique eyes and vision of Arctic reindeer, called Rangifer tarandus tarandus. It shows how Santa and his team of eight reindeer assumed to fly around the world, according to scienceworldreport.

Rudolph can see ultraviolet light, which is not visible to humans and other mammals. This is helpful to scientists when the sun sinks.

Moreover, the reindeer have reflective tissue in their eyes, which changes color from a rich golden in the summer to a deep blue in the winter. While the tissue makes the eye glow at night and helps nocturnal animals to see in the dark, the blue one can enhance their ability to see blue light. Still, fog extinguishes blue light faster than red light, making it tough for Santa's reindeer to be able to see blue.

 It is Rudolph's "luminescent, glowing nose" that plays the role of a navigator for its reindeer mates. It can also serve as a beacon for Santa's sleigh. Moreover, the light from his nose beams the highest level of redness at which mammals are able to see, which is why he is able to perceive through fog light.

To ensure that Rudolph has a safe flight, it is important to supply him with nutritious food. The nose being vascular, it can lead to an excessive loss of body heat, which would expose him to the risk of hypothermia. "It is, therefore, imperative for children to provide high-calorie foods to help Rudolph replenish his energetic reserves on Christmas Eve," said study author Nathaniel J. Dominy and Professor of Anthropology at Dartmouth, in a news release.