When an electron dropped from a high-energy orbit to a lower-energy one, it gave out light with an energy equal to the ...

Matthew D. Taylor is a senior scholar at the Institute for Islamic, Christian and Jewish Studies in Baltimore, and the author of "The Violent Take It By Force: The Christian Movement That Is ...

Tony Gilland is Science and Society Director at the Institute of Ideas and is editor of Science: Can we trust the experts (Hodder & Stoughton, June 2002) ...