From Mark O'Neill
I don’t know if the intriguing idea of the ghost condensate is correct or not (7 February, p 32) but I was worried by the statement: “It is no more able to transmit forces than, say, air” as I am currently watching the blades of a windmill turn.
Stephen Battersby writes:
• What was meant was that particles of the ghost condensate – like air molecules – do not act as quantum carriers of a fundamental force.
London, UK
