Time Changes Modern Human's Face

BBC ^ | 1-25-2006 | Rebecca Morelle

[dread78645]

That's why I'm sticking with my own, and Darwin's, understanding of species ~ that you can produce fertile offspring.

So tigers and lions are the same species?
A killer whale and the bottlenosed dolphin are the same species?

Okay.

[LiteKeeper]

YEC INTREP

[Wacka]

Problem is , she's a Scientologist.

[Christopher Lincoln]

We are not surprised when skulls of people who lived in America in the mid-14th century look different from the average of present-day Americans; in fact, we would be amazed if they didn't. England is different, yes; but is it all that different? I don't think so; as a species we are wanderers, given to moving around.

[muawiyah]

Are their "offspring" fertile?

You have to look beyond the fact that you can mix tigers with lions and get offspring ~ we need to know what happens with the offspring's "offspring", if any.

[dread78645]

Are their "offspring" fertile?

Males are considered sterile, but females are fertile. They can and have produced offspring.

You have to look beyond the fact that you can mix tigers with lions and get offspring ~ we need to know what happens with the offspring's "offspring", if any.

It seems that you need to check the facts, and you didn't.

[muawiyah]

I have followed the tiger/lion story for some time, as has everyone else. Looks like any gene flow between the two kinds of cats would be "one way", hence, not mutually fertile, and therefore highly suggestive of there being two different species.

You'd best check your logic.

[Gumlegs]

But "Where o where are the transitionals?" the creos ask.

To be fair, I suppose no one ever thought of looking in London's plague pits before.

[dread78645]

I have followed the tiger/lion story for some time, as has everyone else. Looks like any gene flow between the two kinds of cats would be "one way", hence, not mutually fertile, and therefore highly suggestive of there being two different species.

So are lions and tigers different species?

Yes or No.

[muawiyah]

Ho doubt Darwin would have thought of them as two different species. Your modern accountant or lawyer might give it a different spin. However, with "some" of the offspring being predictably infertile if crossed with the others, you have different species. This is a bit more complex than the Mule/Jenny thing, but similar.

[dread78645]

H[N]o doubt Darwin would have thought of them as ...

... This is a bit more complex than the Mule/Jenny thing, but similar.

Clintonian shuffle duly noted.

Are lions and tigers different species? Yes or No?

[SunkenCiv]

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