While Homoeopathy should face rigorous scientific scrutiny, neither its critics nor its proponents should decide the answer before the evidence is in. Our previous article, “Homoeopathy, As We Know It,” received both bouquets and brickbats. That was not surprising. Homoeopathy...

When NASA searches for life beyond Earth, it speaks of searching for “life, as we know it.” Those five words capture one of the most important principles of science. If life exists elsewhere in the universe, it may not resemble...