Who introduced the heliocentric model formally in 1543?

The Library of Alexandria was founded in the 3rd century BCE under the Ptolemaic dynasty in Egypt, becoming a hub of ancient learning.

The Code of Hammurabi, Babylonian king’s laws from 1754 BCE, is one of the oldest deciphered writings of significant length.

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

The Roswell incident is linked to alleged UFO sightings, though officials claimed it was a weather balloon, fueling conspiracy theories.

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