In the latest poll of our Science fiction, science fact project you told us that you wanted to know if infinity exists. In this interview the cosmologist John D. Barrow gives us an overview on the question, from Aristotle's ideas to Cantor's never-ending tower of mathematical infinities, and from shock waves to black holes.

Click here to see other articles on infinity and here to read the accompanying article.

And don't forget to vote for the next question from the frontiers of physics you'd like to have answered on *Plus*!