TV and Radio
Meeting Pope John Paul II on the occasion of a cosmology conference at the Vatican Observatory
Illustrating chaos theory using a smoke trail, on the set of Arcadia, the play by Tom Stoppard (please note I am definitely not a smoker).
Holding a small rock from the planet Mars, which fell as a meteorite in Egypt in 1911.
Here is a photo of me talking to high school students.
Inspecting the oldest traces of life on Earth in the Pilbara Hills, Western Australia