Are people seriously still asking this?
There is a whole list of "human missing links" on Wikipedia[1]. The best preserved are the Australopithecus afarensis set of skeletons[2].
It is thought that A. afarensis was more closely related to the genus Homo (which includes the modern human species Homo sapiens), whether as a direct ancestor or a close relative of an unknown ancestor, than any other known primate from the same time.
[1] http://en.wikipedia.org/wiki/List_of_human_evolution_fossils
Here's one: the fact that volcanic islands, which have land that has been historically only accessible to birds, have a number of bird species that have filled ecological niches normally filled by rodents.
Here's another: you can see in the fossil record progressive changes. Sure, there are missing links, but try coming up with an explanation that fits the islands fact (above) as well as this one. In addition, have it explain, in a way that permits further predictions, 10 other otherwise independent sources of evidence.
b) I think we may have just found you.
There are scientists who advocate creation, not evolution and there is no easy way to "prove evolution" as an absolute fact.
People have their reasons for ignoring proofs of evolution and others have their reasons for ignoring proofs of global warming.