What is time? How many dimensions are there? How do you make a time machine? Why can’t you go back in time?
These are some of the questions that were asked by 11-year-old children for the 2013 edition of the Flame Challenge, organized by Alan Alda and the Center for Communicating Science at Stony Brook University. This video is an attempt to answer these questions. It features Albert Einstein, twins that are not the same age, flying saucers that are able to travel close to the speed of light... and dinosaurs!