The world's newest "super microscope" is fired up and ready to go.
The £200m second target station at Isis in Oxfordshire will allow scientists to see things 10,000 times thinner than a human hair.
The machine is known as a pulsed neutron source. But what does that actually mean?
Well, if you're a physicist curious to see how matter behaves when no-one is looking, then Isis is your private snoop.
If you're an engineer trying to make the hydrogen car a working reality, then Isis is your genie.
Want to see how spiders spin silk stronger than steel? Or peer into a newborn baby's lungs as they take their first breath?