[LEAPSECS] 1.26 microseconds

[Tim Shepard]

> 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