Sampling Lava from the Tolbachik Eruption in Russia

One of the things that people forget about lava is that it is much denser and more viscous than it seems. There is all kinds of video showing rivers of lava that make it look like it is as runny ...

Source: http://www.wired.com/wiredscience/2013/01/sampling-lava-tolbachik-eruption/

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