A human is a bipedal hominid characterized by having a higher and vertical forehead compared with earlier hominids.
Human beings can create and use complex tools, solve problems by sense and reasoning, use symbols and language, and create complex social structures.
Evolution of Humans:
Modern human evolved 200,000 years ago.
From an evolutionary perspective, humans and every other living organism that ever lived evolved from microscopic lifeforms that lived almost 4 billion years ago.
These ancestors have a name (or more appropriately, an acronym):- L.U.C.A (Last Universal Common Ancestor).