People and Planet: The American Museum of Natural History in New York has launched a major exhibition showing how global warming is wreaking havoc with natural phenomena. An interactive model of Manhattan in the exhibition shows the effect of rising sea levels. Credit: Denis Finnin/AMNH A model at the beginning of the exhibition shows the southern end of Manhattan Island under 3 and 5 metres (about 10 and 16 feet) of sea-level rise. The higher amount would occur if a significant part of the ice sheets …