Originally posted by Jenyar
Consider what you just said: dogs and humans "separated a very long time ago", and the commonality is that both are mammals. Early dogs/wolves might have hunted early humans (or was it the other way around?)
No the dogs ancestors, which were similar to the cat like fossa of madagascar, definately hunted the humans ancestors which were small rodents. They continued hunting our ancestors as they evolved into possum like creatures and later lemurs.
but you suppose that we were both the same (carnivorous/omnivorous/herbivorous?) animal at some stage with no "natural" food - not life feeding on life, but life feeding on itself. Was cannibalism the only option for such a being?I know you can't answer that - because nobody knows. I just want to figure out where knowledge about evolution ends and where the speculation begins.
Nobody knows? well you can call me "nobody"(it wouldn't be the first time I've been given that label)
There's mindless fantastical speculation and then there's speculation like when flanders "assumed" homer stole his airconditioner after seeing his footprints leading from his smashed window to the side of homers house where an airconditioner was crudely attached.
This belongs in the second category.
When dogs and humans were the same animal they were feeding on other animals as well as plants and insects. Is that so hard to understand?
If you want to go back to when there was only one animal you have to go back to the very origin of life. And the interesting thing about the original life was there was no conformity to its phenotype. The laymans way of putting it would be they were half plant half animal, but really animals and plants are just half of what they were. The least changed descendents of the original life are plankton which are still these "planimal" organisms and they still have an intricate eco-system among their own species. Some look like little crayfish, some look like little blobs, the little crayfish ones will feed on the little blobby ones.
The reason we have eco-systems today is because thats how the original species of organism naturally behaved within its own species. The standards we see today within species, (ie all leopards have spots and act like leopards) didn't exist in the original species. "my brother looks like a microscopic string of leaves and my sister looks like a flea, wierd" is what the original organisms would say is they could talk.
It is this diversity within this single "species" (which could be refferred to simply as life) that allowed such a diverse array of species to evolve from this one animal, sorry aniplant. All plants evolved from it too.
Science hasn't written this down in text books yet, and thats because it can't be proven the same way the tigers relation to the lion can be. But using the method used to establish the tigers relation to the lion, which surpisingly enough is the same as the method used to establish the frogs relation to the salamander and so on and so on, you can stretch it back like mathematics to get to the origin. Its simple(or maybe advanced) logic.
We are fortunate enough to still have animals alive today demonstrating the links and its only by means of pure luck that they standed the test of time.
I'd be stumped if I didn't know about plankton. But the fact it is an organism that has no standard phenotype and is neither plant nor animal is just too obvious.
Then there are marsupials which are clearly part of the transition from reptiles to mammals. And madagascar has the rise of primates in lemurs which are just obviously a possum like creature turning into a monkey. Possums are clearly marsupial rats that got better at climbing trees. It all makes too much sense for any intelligent person to ignore, and the icing on the cake is you can actually see how mammals travelled around the globe evolving as they went.
I'll get into that later if you want, I'm tired now.
PS; as much as fossills have done for the theory of evolution they aren't the only thing to look at. The fact is the amount of fossills found compared to the amount of species throughout natural history would be something like 1 in 80 trillion.
Missing fossills does certainly not a case make.
Brains come in handy for filling gaps, you should trying using yours for that. It IS reliable if done logically, taking what IS known and using it as a precedent, taking into account that patterns are consistent on this planet.