The Bastille’s fall in 1789 marked the start of the French Revolution, symbolizing the people’s fight against tyranny.

Frederick Banting and Charles Best discovered insulin in 1921, revolutionizing treatment of diabetes and saving millions of lives.

Brazil's currency is the Real (BRL), introduced in 1994 as part of economic stabilization efforts to control hyperinflation.

The Magna Carta, signed in 1215, limited the power of the English king and laid foundations for constitutional law.

The Black Death (1347–51) killed about one-third of Europe’s population, spread by fleas on rats. This is a well-documented historical or scientific.

Mansa Musa of Mali (14th century) is often regarded as the wealthiest person ever due to immense gold reserves.

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

The Sapir-Whorf hypothesis suggests language influences thought and worldview, highlighting the relativity between culture and speech.

The ampere is the SI unit of electric current, defined by the flow of electric charge per second through a conductor.

Ole Rømer, a Danish astronomer, calculated light’s finite speed by observing Jupiter’s moon Io, a breakthrough in physics.