Mr. Happer is a professor of physics at Princeton University and a former director of the office of energy research at the U.S. Department of Energy.

WSJ: Harrison H. Schmitt and William Happer: In Defense of Carbon Dioxide

She graduated from the University of Reading in 1985 with a degree in physics and meteorology and in September of that year joined the Met Office in Bracknell, where she worked as a computer programmer.

BBC: Suzanne Charlton was born in Urmston, Lancashire.

Edward Thommes is an adjunct professor in the department of physics at the University of Guelph in Guelph, Ontario, and he joins us today from his office.

NPR: What Makes Our Solar System Special?

This unusual approach gives Mr Pohl the freedom to delve into an extraordinarily diverse range of topics, including the operation of neutrino observatories, the physics of rainbows, the principles of plate tectonics, and how to search for fossils in your office's marble lobby.

ECONOMIST: Good sport