Science is a branch of learning ,dealing with systematic principles. Science deals with innovation and natural ability to cause change. Science is evolution.

Top 10 greatest scientist of time. 
Sir Isaac Newton(1642–1726) Newton was a polymath who made investigations into a whole range of subjects including mathematics, optics, physics, and astronomy. In hisPrincipia Mathematica, published in 1687, he laid the foundations for classical mechanics, explaining law of gravity and the laws of motion.
Louis Pasteur(1822–1895) Pasteur contributed greatly towards the advancement of medical sciences developing cures for rabies, anthrax and other infectious diseases. Also invented the process of pasteurisation to make milk safer to drink. He probably saved more lives than any other person.
GalileoGalileo (1564–1642) Creating one of the first modern telescopes, Galileo revolutionised our understanding of the world, successfully proving the Earth revolves around the Sun and not the other way around. His work Two New Sciences laid the groundwork for the science of Kinetics and strength of materials.
Marie Curie(1867–1934) Polish physicist and chemist. Discovered radiation and helped to apply it in the field of X-ray. She won the Nobel Prize in both Chemistry and Physics.
Albert Einstein(1879–1955) Revolutionised modern physics with his general theory of relativity. He won the Nobel Prize in Physics (1921) for his discovery of the Photoelectric effect, which formed the basis of Quantum Theory.
Charles Darwin(1809–1882) Darwin developed his theory of evolution against a backdrop of disbelief and scepticism. He collected evidence over 20 years, and published his conclusions in On the Origin of Species (1859).
Otto Hahn (1879–1968) Hahn was a German chemist who discovered nuclear fission (1939). He was a pioneering scientist in the field of radio-chemistry, and discovered radioactive elements and nuclear isomerism (1921). He was awarded the Nobel Prize for Chemistry in 1944.
Nikola Tesla(1856–1943) Tesla worked on electro-magnetism and AC current. He is credited with many patents from electricity to radio transmission, and played a key role in the development of modern electricity.
James Clerk Maxwell (1831–1879) Maxwell made great strides in understanding electro-magnetism. His research in electricity and kinetics laid the foundation for quantum physics. Einstein said of Maxwell, “The work of James Clerk Maxwell changed the world forever.”
Aristotle aristotle(384 BCE–322 BCE) A great early Greek scientist who made many researches in the natural sciences including botany, zoology, physics, astronomy, chemistry, meteorology and geometry.