Estimating

My friend spotted this area of felled trees in the forest above Ennerdale. He challenged his children to estimate how many trees had been felled. Estimating is a particularly important skill in Engineering, but also in Physics. Have a go using the second, more detailed, picture. Let me know what you think.

Physics students write on windows

The window of the students cafe in the Particle Physics building at Oxford was covered in equations. I've been experimenting with board pens in my lab - but don't try this at home (or at school).