Qin Shi Huang (221 BCE) unified China, standardized writing, and began construction of the Great Wall.

Henri Becquerel discovered radioactivity in 1896, later studied by the Curies and vital for nuclear science.

Herbert Spencer used “survival of the fittest” to describe natural selection, later associated with Darwin’s theory of evolution.

The Big Bang theory describes the origin of the universe 13.8 billion years ago as a rapid expansion from a singularity.

John Dalton (1803) proposed modern atomic theory, stating matter consists of indivisible atoms with specific weights.

The Great Barrier Reef, the world’s largest coral system, lies off the coast of Queensland, Australia.

Pax Romana (27 BCE – 180 CE) was a period of relative peace and stability across the Roman Empire, fostering prosperity and growth.

The Berlin Wall fell on November 9, 1989, marking the collapse of Communist rule in Eastern Europe. This is a well-documented historical or.

Garrett Hardin explained in 1968 that shared resources tend to be overused and depleted if individuals act solely in self-interest.

DNA, or Deoxyribonucleic Acid, carries genetic instructions in living organisms, forming the blueprint of biological development.