There exists significant evidence for the evolution of man extending back over five million year (and further to man's ancestors) most of which is based on fossil remains, the geological layer in which the remains were found, and fossils of other species found around them.
A humorous piece of poetry written by a one-time collague of mine who used the handle, "Worldling"
Have you ever been cynical of someone's opinion and have them tell you, you should be more open-minded? What they usually mean by that is that you should be more willing to accept their opinion or their version of events regardless of how much sense it makes, of how rational a view, a claim, it actually is. The really important question is, should you?
Many people believe that evolution proceeds by changing organisms slightly, so that species can be lined up to form a gradual series that shows complexity slowly increasing. This view was once held by most biologists but has since been discarded. However, it has been dumpster-dived by creationists seeking materials for straw-man representations of evolutionary theory. Evolution actually takes the form of a branching family tree. Stephen Jay Gould calls ladders and bushes "the wrong and right metaphors respectively for the topology of evolution"
Despite creationist claims to the contrary, radio-isotopic dating methods are accurate to within acceptable limits. The most common claim (aside from references to experiments where a given dating method was demonstrated as fallible) is that a given method's assumptions may have been violated. Typically, these revolve around the constancy of decay rates and claims that contamination may have occurred.
An oft-quoted saying, certainly I have encountered it many times, goes: "There are no atheists in foxholes." This is supposed to indicate that an atheist will, if placed into a life and death situation, turn to some deity or other for assistance. Well let's put some perspective onto the quote, shall we?
Creationists and those favouring intelligent design often point to us, to the complexity, the perfection & the sheer improbability of the world around us in order to justify their view that there must be a designer for the universe, but is this viewpoint fully justifiable?
A brilliantly written popular science book that explains how evolution can create the staggering variety it has, whether dinosaurs were warm or cold blooded, why cinematic monsters such as King Kong and Godzilla are laughably impossible, why the marsupials kept control of Australia, why insects are so small. Finally, he explains why, despite our apparent superiority, we really don't own the world at all, that there is no such thing as a superior or dominant lifeform on the planet. He also explains why, of course, elephants do have big ears.
Once upon a time, debating in a forum (those things that used to be so popular before the advent of social networking) and following my usual strategy of demanding evidence for various claims, I was asked to define evidence. You could have smacked me down with a wet kipper! I hadn't actually given any real thought to it beyond pretty much knowing what it was. Still, an answer was expected and, as is usually the case when debating evangelists, involved a lot more work than their usual strategy of picking holes in established theory.
Science is a methodology and scientific explanations should be based on properly derived data. "Science" which begins with an unshakeable assumption, is not true science. True science is about having no assumptions until they have been accepted through the application of evidence and have demonstrated resilience to genuine falsifiability experiments.