@Hypocrisy_Central
“If evolution was not a upward path ancient man would not have developed spears, arrows, snares, and such to catch prey or flint knives and use of bone to skin the hide or fire to cook the animal or protect the cave so they in turn do not become prey. By way of biology and invention man has by measure improved over his predecessors.”
I understand the temptation to think so, but evolution is not an upward path. That implies a consistent direction, which implies that all species are being selected with a developmental goal. But the direction of evolution is inconsistent through time, as it is determined by changing environmental pressures faced by each species, not inherrent goals. In humans it was our intellect and perhaps our efficient bipedal gate that provided us with an advantage over many other species and other groups of humans. So in this case, intellectual capacity was favoured. But that’s hardly representative of the vast majority of other species.
Also, the vast majority of species that have ever existed are extinct. That’s not upwards.
Also, relative to their ancestors, taxa can lose limbs (ie consider whale evolution, or that of snakes), grow larger or smaller, etc..etc..etc.. Where evolution takes a species depends on a species’ changing environment, selection pressure from other species (competitors, predators), evoltuionary history, and the genes available for selection pressure to act on.
“the species that hasn’t seen that much change like sharks, crocs, ants, and cockroaches would seem to be more adapt than man”
Which species of shark, crocs, ants etc..are you referring to? Don’t confuse retaining a general morphology with evolutionary stagnation.
Check out this basic outline of a which point in the fossil history different shark groups have their first identifiable representatives, or lost representatives, over millions and millions of years of evolution.
http://www.elasmo-research.org/education/evolution/time_chart.htm
That’s not to say that some body plans haven’t been more successful than others. Beetles for instance, as do nemotode worms, kick our assess in terms of being successful body plans for speciation. Why some body plans are consistent óver long periods of geological time, is because such body plans have consistently found suitable environments within which to reproduce. As long as such a body plan is not selected against, offspring retaining this plan with successfully reproduce, and hence the body plan is retained over the eons.
With respect to where human’s will go. I don’t know. It depends on the selection pressure we face, and whether reproductively isolated populations occur.
What’s notable about us now, is that we have the power to dramatically alter our own environments…hence we are directly influencing our evolution via altering selection pressures.