As we all know, animal can communicate with each other with body language, sounds, etc. just like human. But does every animal of the same species communicate the same way? For example, are cats in different areas communicate the same way?
If I am not wrong, the most primitive life is in molecular form. Somehow, they acquire the ability to duplicate themselves, and get better and better through evolution.
But, how, and when do livings acquire the ability to think?(In other words, acquire a brain)
I wonder whether there is such things as de-evolution? In the past, there's an extinct bird called Do Do bird (Is it? I am not quite sure.).At first, it can fly, but several years later, somehow their wings become unable to fly, which made them vulnurable to predator and consequently led to...