GENERAL KNOWLEDGE

Detailed explanation-1: -A wide range of empirical evidence strongly favors the Big Bang event, which is now essentially universally accepted. Detailed measurements of the expansion rate of the universe place the Big Bang singularity at an estimated 13.787±0.020 billion years ago, which is considered the age of the universe.

Detailed explanation-2: -Two million years ago somewhere in Africa, a small group of individuals became separated from other australopithecines. This population bottleneck led to a series of sudden, interrelated changes—in body size, brain size, skeletal proportions, and behavior—that jump-started the evolution of our species.