BBC: Ancient dust buried deep in Antarctic ice sheets could hold information about climate change, a study has suggested. Research by Edinburgh, Stirling and Lille universities indicated that Patagonian glaciers were acting as an “on/off switch” for releasing dust. Researchers said during the coldest periods of the last ice age, these glaciers were at their biggest and dust from them was blown to Antarctica. During warmer periods, dust was trapped in meltwater which ran into …