Newstalk’s studio is in Dublin city centre so if you head out on foot you could probably get to Croke Park in 30 minutes. 

In a car with no traffic you might get as far as Newgrange. 

In a jumbo jet you might even make it to Edinburgh.

But… in this increasingly hypothetical situation, if you had an X3 you could, in theory, get to the moon.

So what is an X3 and why don’t you already have one?

Professor Alec Gallimore is Robert J. Vlasic Dean of Engineering at the University of Michigan.