[allmendream]

Most did to various degrees.

Please educate yourself.

If you think DDT has the ability to cause a specific mutation in a specific gene every time a bird is exposed to it then it has an ability unprecedented and we should really look more into the mechanism, because figuring out how it could do it would be BRILLIANT.

Of course the REAL answer is that DDT didn't cause the same mutation in every Bald Eagle exposed to it. DDT caused the same metabolic problem resulting in thin egg shells.

[Nathan Zachary]

Educate yourself, and learn to read. I didn't say DDT did this to every bird species, you did in fact.

I said it was CLAIMED to have, and I also expressed there were doubts to this claim.

Regardless, the thinning of eagle egg shells was caused by something that obviously caused a genetic malfuntion, temporary mutation that produced thin egg shells.

[Nathan Zachary]

"Harvard University scientists have identified a virtual "speed limit" on the rate of molecular evolution in organisms, and the magic number appears to be 6 mutations per genome per generation -- a level beyond which species run the strong risk of extinction as their genomes lose stability."

http://www.physorg.com/news110478853.html

Educate yourself.

[allmendream]

Lundholm, C.E. (1997). “DDE-Induced eggshell thinning in birds”. Comp Biochem Physiol C Pharmacol Toxicol Endocrinol 118 (118): 113. doi:10.1016/S0742-8413(97)00105-9

DDT is an ion channel disruptor. It is thought to impair the egg laying glands ability to excrete calcium carbonate.

This is NOT due to a mutation in the birds DNA. In other words DDT doesn't know where the egg laying genes are and knows to mutate those genes specifically, a mode of action that so far NOTHING we know of can accomplish.

And what the heck do you think a “temporary” mutation is?

How is it different from a not “temporary” mutation?