[MIchaelTArchangel]

The title of Darwin’s book is “The Origin of Species” NOT “The Origin of the Species”.

[Vaquero]

Wow! Was that called for?

[OldNavyVet]

You are right. I made a typing mistake ... Darwin's book is titled "The Origin of Species."

Meanwhile, I discovered a fascinating story at page 283 of Jones book.

There, writing about birds, he writes ... "If an egg is incubated at low temperatures it develops into a male, at higher temperatures into a female."

Makes one think ... is that fact applicable to humans?