Most apes bodies are completely covered in hair with the exception of their faces; humans being the exception with only very fine hair on their bodies  while adult male humans grow thick facial hair, in particular moustaches.  I imagine heat, clothing, etc may have caused humans to lose their body hair in the course of evolution but I'm intruiged about why we gained a moustache.

The human genoproject has demonstrated that the global population of humans can trace its roots to Africa. Given we're all linked to the same ancestory are we less genetically diverse than our African ancestors. ie over 200,000 years how much new mutation would have been added to our dna and how much would we have lost due to inbreeding in what is suspected to be small migratory groups out of africa.

I've heard from a few sorces that we can now input computational images into the eye. The sources didn't go into much detail on how to do this, but I am buessing that they figured out how visual images are processed through our Optical Nerve, and - after some lengthy reasearch - were able to imitate these electrical nerve pulses and hook up a wire directly into the part of the brain which processes images.

Is this right, and if so, then why does it work? Shouldn't the patient feel some sort of electrical current flowing throught their brain? Why does the patient's brain recieve the image as if it were a normal image from out eyes?

Most other animals, like wolves, cat family, horses, antelopes, etc., predator and prey alike have relatively simple shaped ears, whereas we have a much more complex shaped reflector.  What was the evolutionary pressure for our more complex shaped ears?

I just re-watched a show called 'megstructures' where they featured a rollercoster called kingda ka that reached over 200kph in 3.5 seconds and is also the tallest in the world. 

If we put cost aside, and only focus on a) human ability to withstand ride and b) the ability of the physical structure to withstand.  could we potentially see roller costers the height of buildings going at yet unseen speeds and heights?

i understand how some trained people can withstand g forces like fighter pilots.  But keep in mind rides need to be for general public.

People can be infected by bacteria, viruses, fungi and animal parasites, but are any human or animal diseases caused by plants?

Is it possible to suffer a moss infection, come down with a bad case of the ferns, or contract wisteria? If not, why have no plants taken advantage of us in this way?

Bevan Tattersfield, London, UK