Colin Stuart will give tonight’s talk. It can be wasted and killed. Spent and saved. Kept and lost. Time is one of life’s most perplexing mysteries. In the century since Einstein turned our ideas about time upside down, we know more about it than we ever have, but big questions remain. Can you go back and kill Hitler? What happens to time inside a black hole? Does time even really exist? Find out our latest thinking in this journey through Einstein’s universe, during which you’ll meet the greatest time traveller in human history and take part in a real time travel experiment.