The cosmic chasm – Physics as we know it is elegant and exquisitely accurate. It tells almost nothing about the deepest riddles of the Universe.

There’s also a limit to how big a particle accelerator we can build. To reach higher energies, we need to construct bigger tunnels but, of course, we live on a finite planet, and so there’s a limit to how long these tunnels can be. And what if, even with all these souped-up observatories and instruments, we still don’t find out what the dark matter is, what dark energy is, or how the Universe began?