If anyone is wondering what they mean by half life it means the amount of time it takes for atoms of a radio active substance to disintegrate by half. So they are saying it will take 4.5 billion years for half of the DU to disintegrate.
After that it will take another 4.5 bil years to half that half and make 1/4 and so on.
If anyone is wondering what they mean by half life it means the amount of time it takes for atoms of a radio active substance to disintegrate by half. So they are saying it will take 4.5 billion years for half of the DU to disintegrate.
After that it will take another 4.5 bil years to half that half and make 1/4 and so on.