When looking at any other species of animal they all look virtually the same other than maybe a few things like weight and size, but when looking at facial or body features they are almost identical.

But when looking at the human species all males other than a few lookalikes or twins look different, likewise with females. Yes we all have two arms and legs, but i'm talking about facial features and body dimensions. Some ahev broad noses, some have long thin noses. These are not things you see in other species. Why is this so??

Why cant i sleep late (on a saturday morning) when i want to and cannot get up (monday through friday)when have to? 

Flowers co-evolved with their pollinators: that is why they find flowers attractive. This arrangement works to the benefit of both parties, so do humans get any similar benefits from liking flowers? The plants do, in that gardeners propagate them.

Come to think of it, are other mammals attracted to flowers?

Jim Simons, Cheltenham, Gloucestershire, UK

At the site of car accidents or unfortunate happenings there will always be crowds of people watching (and sometimes taking photographs).So why are humans so attracted to these things? Surely this is not a survival advantage since this curiousity would have led many people into trouble if the police hadn't been there to keep them back.

While I'm sure personal human flight is much easier through fixed wings and some sort of rocket or jet propellant, however, these are not nearly as cool as a nice set of wings like a bird. I know humans are much bigger and heavier than any flying species of bird and are therefore not naturally built for flight at all. But surely this isn't beyond the capabilites of humans?

Evolution posits that humans and chimpanzees are descended from a common ancestor. Other animals also share common ancestors or intermediate forms. Have any of these intermediate forms survived to the present day? Or have only the final forms survived? Shouldn't every final form also be an intermediate form?

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.

Does life span actually matter to animals, and why do we all live for different periods of time?  Does a beetle's life feel quicker, or what?  Why has evolution made us like this?