Assuming that we could ever figure out how to travel faster than the speed of light, there may not be a heck of a lot that we could do with it. That’s what Professor William Edelstein of the Johns Hopkins University School of Medicine (dude sounds like a polymath for having a good head about medicine and high-energy physics) has determined.

The problem is hydrogen, which exists in interstellar space on average of two atoms per cubic centimeter. Which ain’t a whole lot. But if a spacecraft were to accelerate toward lightspeed those scarce atoms would start bombarding the ship like a hail of bullets…

As the spaceship reached 99.999998 per cent of the speed of light, “hydrogen atoms would seem to reach a staggering 7 teraelectron volts”, which for the crew “would be like standing in front of the Large Hadron Collider beam”.

This is a very bad thing,