Physics is everything
Incidentally a person whose name started with the word new set in motion unraveling the mysteries of the world which were till then mere speculation. He did that through some important factors like observation, questioning why what he observed was as it was, then creating ways and means to get an answer for that why?
All great learning and discoveries go through this process. So never hesitate to question and never stop till you find the most convincing answer to that question.
You guessed it right he was Sir Issac Newton.
Listen to this wonderful lecture
and this lecture explains the fact that we , I mean the whole of our human kingdom including the whole of environment is just 0.03 per cent of the universe.
So there is a lot new to find out.