It might be hard to beat the success of the Mars rovers, but what else should make it onto a best-of-2004 list of science stories? Maybe Russia's ratification of the Kyoto Protocol, drug safety, or the discovery of a new species of ancient humans? We take a trip back through the year in science.
John Rennie, editor-in-chief of Scientific American.
K.C. Cole, science writer for the Los Angeles Times.
Donald Kennedy, editor-in-chief of the journal Science.