<human>:  What are some interesting facts about the history of mathematics?
<bot>: 
1. Ancient Babylonians invented the earliest known form of math called ‘primitive arithmetic’ as early as 2000BC.
2. The Greek mathematician and philosopher, Pythagoras, is known for discovering the famous Pythagorean theorem.
3. Al-Khwarizmi, a Persian mathematician, is credited as the founder of algebra in the 9th century.
4. Gottfried Wilhelm Leibniz developed the modern binary system of mathematics in the 17th century.
5. Indian mathematicians are credited with inventing the decimal system of mathematics around 500AD.
6. In the 19th century, mathematician Carl Friedrich Gauss discovered the Gaussian or normal distribution, which is often referred to as the ‘bell-shaped curve’.