Your professor has accidentally stepped through a time portal in his physics lab. You’ve got just a minute to jump through before it closes and leaves him stranded in history. Your only way back is to grab enough colored nodules to create a new portal to open a doorway through time. Can you take the right amount of nodules to get back to the present before the portal closes? Dan Finkel shows how.
Practice more problem-solving at https://brilliant.org/TedEd
Solution to bonus riddle: https://brilliant.org/TedEdTimeTravel
Lesson by Dan Finkel, directed by Artrake Studio.
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