You don’t contemplate a more dramatic change in our functional appendages, other than skin features & color?
It is remarkable (in just a few decades) how much our diet and lack of manual labor has caused a discernable increase in the number of grossly obese people. Not just layers of fat skin, but huge, huge buttocks and breasts in women and large, large abdomen in men.
Focus on this - bring some catastrophe to the template - use your anthropology expertise - like tail bones - create some prototypes - you can do it;)
Go on!
apropos of nothing...
http://www.freerepublic.com/focus/news/1872486/posts?page=9#9
Perhaps Humans will be extinct — but certain life forms will persist:
http://www.freerepublic.com/focus/f-chat/1647010/posts
http://www.freerepublic.com/focus/f-chat/1646657/posts
http://www.freerepublic.com/focus/f-chat/1654389/posts
http://www.freerepublic.com/focus/f-chat/1692612/posts?page=49#49
http://www.freerepublic.com/focus/f-chat/1692612/posts?page=53#53
http://news.bbc.co.uk/1/hi/world/americas/5067912.stm
If there’s some kind of show-stopper, such as a series of impacts (it’s pretty likely that impacts arrive in groups of at least two; the SL-9 impacts 13 years ago about now numbered more than 20), civilization will cease, and surviving human populations (y’know, after internal struggle and atrocities against one another) will be isolated from one another. Due to isolation, genes would get concentrated on a random basis and lead to pronounced ethnicities which don’t exist per se today — the same process by which we all got to where we are today.
Provided such survivors aren’t hunted out by a top predator, IOW, assuming the survivors preserve tools, or re-learn toolmaking skills, islands of genetically compatible groups will diverge from one another, but still be genetically compatible. There’s no way to predict what they’d look like, or whether they’d lose their wee-wee toes and earlobes.