Quaxar said:
http://www.daviddarling.info/images/primate_family_tree.gif
I like that one. It's colourful.
I also like that picture for an unrelated reason because I can point at it, while doing a "did you know...?" speech.
Did you know that all members of the Haplorhini family tree (those on the brown side) are unable to synthesize their own Vitamin C? Did you also know that the inability to produce your own Vitamin C is a relatively rare condition in the animal kingdom? Most mammals and in fact most animals in general make their own Vitamin C.
Now, most people understand that a lack of Vitamin C is generally a bad thing. Without this vitamin in your body, you would quickly develop a condition commonly known as scurvy and your body would start to break down. Do not expect to live much longer than three months of a complete Vitamin C free diet. It wouldn't be a very comfortable death, either.
Because of this, it's easy to assume that the reason the ability to make your own Vitamin C is so prevalent in the animal kingdom is simply because that when an animal was born without it, it usually died before passing its genes to the next generation.
However the Haplorhini diet is mainly fruits, which is rich in Vitamin C. This means that when an animal was born with this defect, it continued to live a normal healthy life and passed its genes down the line. In due time it became the dominant trait and eventually, all members of its species were lacking this ability.
Now, the Strepsirrhini (those on the red side) still have the ability to make their own Vitamin C, which tells us that this change occur after the two family tress branched off and before Tarsiers branched off from other Monkeys.
To make it absolutely clear; this condition is consistently present in all Haplorhines (including humans) and that Strepsirrhines are the only primates that can make their own Vitamin C.
Now, you can throw all the tantrums that you like about how your granpa wasn't a gibbon who married a gorilla and subsequently gave birth to humans but when you're dealing with facts like that we share 98-99% of our genetic material with other closely related primates and that we all share a relatively rare genetic disorder, compared to the rest of the animal kingdom, you have to at very least consider the possibility that maybe, just maybe there's something to this whole "evolution thingy".