it hit mississippi as a category one storm. but, at least with this hurricane, impact in the usa were not as serious as has been feared. we know a lot about hurricanes in the era of modern weather technology, past 100 years or so. but what about the hurricanes that came before that? well doctors james and lisa baldini from durham university running a project in the caribbean to answer that question. thanks forjoining me. it involves being to caves. yes, it does. caves are the most obvious place to look, but in fact they are full of really interesting deposits called stalagmite and stalagtites. what we aim to do in this project is to reconstruct long—term records of hurricane impact, and... you've got a stalagmite here, what does that tell you? they grow up from the ground of the cave, and they are deposited as the drip water drips onto the ground. that drip water has a chemical signature that reflects the rainfall at the time it was going. hurricanes have a really unique chemical...