Mercury shrinking NASA confirms: 4.3 miles in 4bn years
 

Mercury is shrinking, its radius reduced as much as 4.3 miles over the past four billion years, scientists have confirmed, with the planet contracting as its iron core cools. The … Continue readinghttp://feeds.feedburner.com/~r/slashgear/~4/L_9OxgK1YVs

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