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??

I recently read that during a change in earth's climate 70 per cent of the creatures became extinct.  If we can predict this can we predict how many species were alive, for example do we know at what point the most species lived on the earth?

Surely it is not now.