Question

Why we have two ears.what do you mean by big bang theory.how it made.is there any another solar system in the uni verse.

Answer 1

We need both ears to hear well. We have two ears to tell our brain from which direction sounds are coming from. If there is hearing loss in bothears, it is usually a good idea to acquire hearing aids for both ears.
The Big Bang theory is an effort to explain what happened at the very beginning of our universe. Discoveries in astronomy and physics have shown beyond a reasonable doubt that our universe did in fact have a beginning. ... Singularities are zones which defy our current understanding of physics.
The Big Bang is a scientific theoryabout how the universe started, and then made the stars and galaxies we see today. The universe began as a very hot, small, and dense superforce (the mix of the four fundamental forces), with no stars, atoms, form, or structure (called a "singularity").
For many years scientists have studied our own solar system. But until the last few years, we knew of no other solar systems. This may seem surprising, as the Sun is one of about 200 billion stars (or perhaps more) just in the Milky Way galaxy alone.