Mudcat Café Message Lyrics & Knowledge Personal Pages Record Shop Auction Links Radio & Media Kids Membership Help
The Mudcat Cafeawe

User Name Thread Name Subject Posted
GUEST,Rumncoke BS: Evolution is Here to Stay (70* d) RE: BS: Evolution is Here to Stay 16 Oct 05

Here in the UK we have two sorts of gulls (amongst others) one is called the black headed - because in the breeding season it has a black head - the other has a black back. They are about the same size and shape, but they are regarded as separate species as they do not interbreed.

If you leave these shores and proceed around the world - either way - your choice - you will find that other places have a similar gull - but only one species, not two.

If you keep going you will see that there are gulls very like the ones in the place you just left - but - as you go round the world the one sort slowly changes into the other. If you were to take gulls from a one gull species spot to another a few hundred miles further on in the circumnavigation they would have little trouble integrating with the locals. It is only when you reach here again that the sum of all the differences is apparent.

The UK has both ends of the spectrum, or series, whatever you want to call it. It seems to show that what we call a species is just the end of a very long line.


Post to this Thread -

Back to the Main Forum Page

By clicking on the User Name, you will requery the forum for that user. You will see everything that he or she has posted with that Mudcat name.

By clicking on the Thread Name, you will be sent to the Forum on that thread as if you selected it from the main Mudcat Forum page.
   * Click on the linked number with * to view the thread split into pages (click "d" for chronologically descending).

By clicking on the Subject, you will also go to the thread as if you selected it from the original Forum page, but also go directly to that particular message.

By clicking on the Date (Posted), you will dig out every message posted that day.

Try it all, you will see.