Olympian: And theres a word that should get everybodys attention. Last month, two groups of scientists, publishing separately in the journals Science and Geophysical Research Letters, issued reports that came to alarmingly similar conclusions: The melting of the West Antarctic ice sheet has reached a point of no return. If greenhouse gases stopped spewing forth tomorrow, wed still face the grim prospect of steadily rising seas from this unstoppable melt. So it would be a good idea to save what ice we still...