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Asked by Lets be a goose 0.5 to David, Eva, Kate, Nicholas, Rachel on 15 Nov 2015.
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Eva Weiss answered on 15 Nov 2015:
For the same reason humans do! The radiation in the sun damages the skin causing the sun burn. The UV radiation damages the DNA in your skin cells and the sun burn is the body’s reaction to it: repairing the cells, peeling off irreverably damaged skin cells,… Humans have pigments in the skin, which protect it from sun damage to some extent. The pigment melanin in our skin absorbs the radiation and thereby protects our skin. Then we are exposed to sun, our skin produces more of it to protect the skin more: we tan. Many pigs are bred in a way that they don’t have those pigments in their skin so they don’t have any protection against the sun. They burn.
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David Nunan answered on 15 Nov 2015:
Hey,
Pigs burn for the same reason as you and me! When the suns invisible ultraviolet light hits the skin, it damages the DNA in the body’s cells, throwing the whole shape of the DNA molecule out of whack. The cell with the messed-up DNA usually then commits suicide, a process called apoptosis.
The body senses this destruction and starts flooding the area with blood to help with the healing process. Inflammation also occurs which is what causes the pain.
Pigs can’t sweat so they tend to over heat and burn even easier than humans!
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Nicholas Pearce answered on 16 Nov 2015:
The sun can burn pigs the same way it can burn us. Pigs will roll around in the mud to stop too much sun getting on their skin – it’s the closest thing they have to factor 50 suncream!
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