Physics

What does the Challenger disaster tell us about the meaning of “evidence”?

We’ve just been watching the excellent new BBC/Open University movie, The Challenger, starring William Hurt, telling the story of how Nobel prize-winning physicist Richard Feynman uncovered the truth behind the 1986 space shuttle disaster. As a former physicist with a passion for science stretching back as far as I can remember, I’m getting increasingly concerned … Continue reading What does the Challenger disaster tell us about the meaning of “evidence”?

30 kg plutonium missing from Sellafield nuclear plant

30 kilos of plutonium went missing from the Sellafield nuclear reprocessing plant in 2003/4 according to the BBC News this morning. That’s enough to make 7 atom bombs! So where did it go? The BBC says it’s “just on paper”: There is no evidence to suggest that any of the apparent losses reported were real … Continue reading 30 kg plutonium missing from Sellafield nuclear plant