What's the difference between corporation and incorporation?

If you could dedicate your life to science, what field would you choose?

If you has been able to dedicate your life to science, what field of science would it be? and why?

What does happiness for you mean? Everyone realizes his\her happiness differently because of unsimiliar culture, traditions and circumstances. I would like to compare the happiness levels between countries. So, if you don't mind, became the part of it and tell me: what is happiness for you?