Origins -

: Proposes that the universe expanded from an extremely hot, dense state.

Scientific research into the start of life explores how non-living chemical compounds transitioned into self-replicating biological systems roughly . Origins

: Evidence shows modern humans ( Homo sapiens ) evolved in Africa before migrating to Asia and Europe between 2 million and 1 million years ago . : Proposes that the universe expanded from an

: The rise of the first city-states (e.g., in Mesopotamia and Egypt) introduced complex social hierarchies, writing, and organized religion. Origins

: Explains how the first atoms (mostly hydrogen and helium) formed in the first few minutes of the universe.