The CT scanner at the University of Southampton is a whole room! The door is made with four tons of lead, and once that is closed then the only way to see what is happening is on the CCTV. You can see the column of roach stone on the left, with the x-ray source next to it; the right hand picture shows the same from above. What is vital to this scanner from my point of view is the ‘µ’ in the title, which stands for ‘micron (that is one thousandth of a millimetre). This scanner is very high resolution, so should be able to show up the minutest details of the fossils within the stone. I say should, as it is going to take 19 hours of scanning, so I won’t see the results until tomorrow. Thanks Mark for a fascinating day.