CBC: The last time the Earth grew warmer than it is today, melting ice caused the oceans to rise very suddenly, a new study of fossil corals has found. The evidence backs up predictions that such dramatic sea level changes could soon happen again. The rapid sea-level change in the study took place about 125,000 years ago at the end of the last ice age, said Paul Blanchon, one of the researchers who conducted the study published in Thursday’s issue of Nature. “Sea level must have …