In this video segment adapted from NOVA, watch as scientists collaborate to collect and then chemically analyze samples of molten lava as part of their quest to learn more about how volcanoes work. By collecting samples of lava before it has a chance to cool, researchers can study the chemical properties it had when it was deep within Earth's interior, just before it was forced to the surface. Questions such as whether two volcanoes share a common magma source can be answered through such analyses.
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