This photograph may be used ONCE and ONLY in the context of news coverage of the the April 2011 issue of National Geographic magazine. The photograph must not be manipulated or altered in any way. No sales, no transfers. Unauthorized use and/or failure to adhere to our publication requirements will result in penalty fees.
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The lava at Nyiragongo is made of an alkali-rich volcanic rock; its unusual composition may be a factor in the lava’s fluidity.