Welcome to my first wikia page! Please don't judge and tell me if I made a mistake or if I forgot to add something!
Science!Sans was created by talkingsoup and is usually seen wearing a labcoat, with some exceptions.
Science Sans also appeared in the Christmas Party AU by Lover of Piggies on Tumblr, where he wears a green sweater that reads 'MERRY MATH-MAS'. He also has reddish spectacles.
A younger Sans working with Alphys to track the anomalies. He is a lot more excitable, quite like his younger brother, and even has his 'googly eye' movements. Overall, he is a lot happier in this time. Some facts that point towards science Sans in the game are the 'joke book inside a quantum physics book inside a joke book inside a quantum physics book', Sans's secret room, and Sans's ability to alter space/game files to teleport at will. He Still has his abilitys to teleport, and summon gaster blasters, just as his future self/Original Sans.
Science Sans wears reddish spectacles and a sweater that says 'MERRY MATH-MAS' In the Christmas Party AU
He first appears talking to Underfell Sans, then he goes up to Classic Sans because the eggnog was spiked, and he admits to wanting to kiss Underfell Sans, even though they don't have lips.
He comes back a few pages later with UnderSwap Sans, who is the President of the Friend Club. They are trying to get Papyrus to join, and he asks what Science Sans does, and he says he's the Minister of War. They get into an arguement which ends with US Sans to say that he'll become a unjust leader later into his ruling.
When UnderFell Sans gets into a fight with UnderFell Papyrus he goes to comfort him with knock knock jokes.
Later, when UnderFell Papyrus asks about Friend Club to US Sans, he inquiries if it's 'Some sort of mutual agreement between two monsters to decimate their enemies together?' US Sans says that not how it works but Science Sans jumps and says that's exactly how it works, and suggests he should talk to UF Sans.
US Sans says that he was helping him, and tells him not to lie about Friendship. Science Sans asks why, because it's the easiest way to control the masses, and US Sans gets upset and UF Paps screams at them to just help him with his effing brother, to which UnderSwap Papyrus comes and basically gets angry for swearing in front of US Sans.
Later, when Science Sans was alone, Fresh!Sans came and scolded him for thinking unpure thoughts (clinking teeth with alternative version of self) and Science threatened to tell everyone he was harassing him, but Fresh Sans points out that no one would believe him and "Fresh Poof!" skateboards away.
Later on, Fresh hands Science Sans a note from US Sans to meet him in private.