watch avengers endgame, you'll be an expert then
during one part, stark shows the little thingy that unlocks time travel so hope this helps
im sry if this is a legitimate question ur asking
Answer:
Formula of what?!??? XD
Step-by-step explanation:
Time Machine is science fantasy which hasn't yet reach its realisation so there's no formula of time machine.
9.2m questions
11.9m answers