[allmendream]

It caused the SAME egg thinning mutation in every bird exposed to it?

Wow, you really believe in magical mystical DNA.

Sorry, but what you propose is just idiotic.

A chemical derivative of DDT interferes with the chemical/enzyme process whereby a bird forms an egg shell.

Thus every bird species exposed to DDT is going to experience thinning egg shells.

[Nathan Zachary]

"Thus every bird species exposed to DDT is going to experience thinning egg shells."

But every bird DIDN'T have that problem.