by Kelley GreeneBuzzFeedBuzzFeed StaffAs a Resident Writer here at BuzzFeed, I cover topics like politics, weird history, tech, trending viral stories, and other various corners of the internet. Ah, Donald Trump's hair. NurPhoto / NurPhoto via Getty Images Its form and structure have long been a mystery. Chip Somodevilla / Getty Images And a point of much speculation. Manuel Balce Ceneta / AP Which even led to Jimmy Fallon controversially messing it up during an interview back in 2017. NBC Universal / Via youtube.com Fallon later said he regretted it, calling it a "mistake." Anyway.