[LEAPSECS] 1.26 microseconds

Tim Shepard shep at alum.mit.edu
Mon Jun 13 17:26:45 EDT 2011

> PS: I read an interesting note recently about how the fact that

> years have varying lengths have become an issue for determining the

> "official" half-life of long lived radioactive isotopes: Many

> geological methods just counted years, but hadn't considered how

> long those years were.

Oh that is easy. A year is however long it takes a tree ring to grow.

-Tim Shepard
shep at alum.mit.edu

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