Much like the heat of the sun or McDonalds' apple pies, the radiation source of Donald Trump's orange face has confounded thinkers for some time. The New York Times recently did some digging into the source of Trump's tan, but found that there's a simple, scientific reason for his mid-February glow: it's just his excellent genes.

"The official line from the White House, as with other matters surrounding the president’s physical health and appearance, is that Mr Trump's glow is the result of 'good genes,' according to a senior administration official who would speak only on the condition of anonymity." The official did admit, though, that Trump applied "a little powder - a translucent one, not a bronzer" to himself before TV appearances.

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That's not quite what other White House insiders have said. The consensus, as put forward Republican National Congress make-up artist Jason Kelly ("I know exactly what he does to himself - the tanning bed, the spray tan, he wears the goggles and you can see the hyperpigmentation around his eyes") and former aide Omarosa Manigault Newman, is that Trump hits the beds regularly. Manigault Newman suggested in her book Unhinged that Trump has had a tanning bed installed in the White House, while old friends of Trump's from military school say he used to like popping a tanning bulb into a socket to top himself up.

Apart from anything else, we're being asked to blame the genes of a man who was born to Fred and Mary Trump, possibly the whitest people ever to have lived.

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It's a shame Trump apparently didn't inherit his pop's gargantuan eyebrows, though maybe the stress of being blasted with ultraviolet light every day has stunted their growth.