ok ill take a stab at it. i got the jist of it (radioisotope dating makes for an old earth?).
Here's a YEC explanation:
QUOTE FROM BIBLE:
"And unto Adam he said, Because thou hast hearkened unto the voice of thy wife, and hast eaten of the tree, of which I commanded thee, saying, Thou shalt not eat of it: cursed is the ground for thy sake; in sorrow shalt thou eat of it all the days of thy life; "
When God says "cursed is the ground for thy sake" he is saying that introduction of death into the world will be the means of salvation. It is for man's good that death was introduced so that Christ could take death upon his own body and pay the penalty for us.
The word "ground" is actually the same word used for "earth". So it was the entire earth that was cursed, and everything in it: humans, animals, plants.
When the Bible says: "cursed is the ground for thy sake" it is likely that a burst of radioactivity was released from the rocks. This would effect the rate of radioactive decay, thus throwing off dating methods (carbon dating etc). See my section on carbon dating for more info
Commentary on Genesis chapter 3
doubt evolutionists will think of this as a satisfying answer though...
[This message has been edited by hoju, 12-15-2003]