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There's been so much of this sort of thing in the news lately you might have seen this image. If not, no hints.
Give up? Read on…
It's a close-up of the rising ash cloud from Iceland's Grimsvotn volcano, as seen from space. The full image is below.
The ash cloud rose 12 miles (20 km) into the air this week. You may remember the even-harder-to-spell Icelandic volcano, Eyjafjallajokull, which erupted last year and disrupted air travel over Europe. Grimsvotn's ash cloud has already reached a higher altitude, according to NASA.
(Truth be told, you might have seen this image on our site yesterday or today.)
Got a strange or interesting photo related to science, nature or technology? What the Heck, send it to me and maybe I'll use it. And you follow me on Twitter or Facebook.
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Robert is an independent health and science journalist and writer based in Phoenix, Arizona. He is a former editor-in-chief of Live Science with over 20 years of experience as a reporter and editor. He has worked on websites such as Space.com and Tom's Guide, and is a contributor on Medium, covering how we age and how to optimize the mind and body through time. He has a journalism degree from Humboldt State University in California.

