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Re:Thousands of underground gas bubbles poised to 'explode' ... by xapata on Thursday March 23, 2017 @07:27PM (#13945294)
A half-life describes an asymptotic curve. You don't just divide a "lifetime" by 2.
Re:Thousands of underground gas bubbles poised to 'explode' ... by Retric on Thursday March 23, 2017 @09:33PM (#13945853)
1 + 1/2 + 1/4 + 1/8 + 1/16... = 2 so it's not that far off as an approximation but yea 1/LN(2) = 1.44 so the low number is 5 point something years and the high is 6 point something years.