A Brief History Of Everything - by Saleem Rana

A Brief History Of Everything - by Saleem Rana: "I was wondering about how everything we know came together to be the way it is right now and what will happen to us as a species.

The story of everything started 15 billion years ago.

The universe, as we know it, was created by an enormous explosion of matter to create space-time. A fiery, dense universe started to inflate.

For three billion years, optically dense matter/energy decoupled and created an invisible universe.

It took another billion years for clusters of matter to form. As heavier nuclei synthesized they formed protogalaxies.

After more than 5 billion years after the big bang, galaxies formed. Later, new galaxies, more like our own, with heavier nuclei came into being.

Around the 10 billion year-mark, our solar system, with orbiting planets formed.

A billion years later, in the primordial oceans of earth, atoms combined to form macromolecules capable of self-reproduction and self-assembly. This was DNA, the basis of all life."