Grass is green because of the pigment chlorophyll, which is a biomolecule that is vital to photosynthesis. Chlorophyll absorbs blue light (short wavelength, high energy) better than anything other light, which is the reason why most plant life is green. Of course, it isn't the only pigment found in plants which is the reason why plants come in a variety of colors, but it is by far the most common.
Where did we come from? what are we made of?
We are the product of billions of years of evolution through natural selection and we're made primarily of oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus.
There are other universes O.o
Probably, but chances are we'll never interact with them.
O.o There is fourth dimensional. Thats a Theory, but eh.
Thats a discussion for another time.
We live in a four dimensional universe, three spatial dimensions and one of time: spacetime.
We can and we even have proof of it in nature. They call them black holes. Faster than light and more powerful. Problem is that going the speed of light would destroy everything in its vicinity.
There is nothing about that statement that is even close to being correct.
What's time dilation for?
To make everything less confusing
This is wrong on both of you. Time dilation doesn't serve a "purpose;" it is part of the nature of spacetime itself.