[<1/1,000,000th%]

Iron 56 is the stable isotope. Iron 60 has a half-life of 1.5 million years. If this event occured 2 million years ago there would still be a lot of it around. For comparison the half-life of Carbon 14 is 5730 years (yes, its that carbon 14).

[Lagrange Point]

Just a question...What is the half life of carbon 12? If all elements will eventually decay to iron 56, how long will that be? I have heard of the universe eventually becoming "cold iron" (assuming that there is insufficient mass to stop expansion).

L.P.