the answer to your first question is that without nuclear fusion in the heart of stars there would only be the most basic elements like hydrogen and helium. other elements such as carbon are made...
1) Why we're here is answered differently by different people. So any answer I give will be biased and not agreed upon by the majority. 2) The universe is the sum of everything around us that has: a)...
The universe? You need to clarify... Our little corner (solar system), the sun light is obvious; seeing how amazing a star filled sky looks is also obvious. Also, depression from lack of sunlight or...