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

Orville and Wilbur Wright achieved the first powered flight on December 17, 1903, at Kitty Hawk, North Carolina.

The Dead Sea Scrolls, found in caves near Qumran in Israel (1947), include ancient Jewish texts vital to biblical scholarship.

Werner Heisenberg introduced the uncertainty principle in 1927, highlighting the fundamental limits of measuring subatomic properties.

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

The Kyoto Protocol of 1997 aimed at reducing greenhouse gas emissions, establishing binding commitments for industrialized nations.

Mycobacterium tuberculosis is the bacterial agent of tuberculosis, a contagious respiratory disease affecting millions worldwide.

The Schengen Agreement allows passport-free travel across many European countries, facilitating movement and integration in the EU.

The Rosetta Stone contained inscriptions in three scripts, allowing scholars to unlock Egyptian hieroglyphs for the first time.

Isaac Newton formulated universal gravitation, showing that bodies attract with a force proportional to mass and inversely to distance squared.