Delivering the demands

Here's me and a few friends yesterday helping to deliver demands to the Cambridge colleges that are still investing in fossil fuels  (i.e. all except Clare Hall and Queen's). I'm the one in the T-Rex costume...

These are the demands we delivered:

And here's a T-Rex explaining to a Brontosaurus the concept of logarithms as we pass the Whipple Museum on the way to Darwin College.  The Whipple Museum has a lovely example of Napier's Bones, a calculating device invented by the discoverer of logarithms.