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Science Trivia & Discoveries

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Fun facts and history behind famous scientific discoveries.

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When were units of measurement first developed?

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  1. 1When were units of measurement first developed?
    Around 3000 BC in Egypt, Mesopotamia, Elam, and the Indus Valley
  2. 2What is the oldest extant record of a unit of length?
    The cubit-rod ruler from Nippur (c. 2650 BC)
  3. 3When did Babylonians first solve quadratic equations?
    Around 2100 BC
  4. 4Who discovered Pythagoras's theorem before Pythagoras?
    Baudhayana in India (c. 700 BC) in the Shulba Sutras
  5. 5Who is credited with proving Thales's theorem?
    Thales of Miletus (c. 600 BC)
  6. 6Who discovered irrational numbers around 500 BC?
    Hippasus, a Pythagorean
  7. 7Who identified that moonlight is reflected sunlight?
    Anaxagoras (c. 500 BC)
  8. 8Who discovered conic sections in the 4th century BC?
    Menaechmus
  9. 9Who developed coordinate geometry in the 4th century BC?
    Menaechmus
  10. 10When did Euclid prove the infinitude of primes?
    Around 300 BC
  11. 11What did Euclid discover around 300 BC?
    The Euclidean algorithm
  12. 12Who described binary numbers in the 3rd century BC?
    Pingala in Mauryan India
  13. 13Who described the Fibonacci sequence in the 3rd century BC?
    Pingala in Mauryan India
  14. 14Who discovered the Sieve of Eratosthenes?
    Eratosthenes (3rd century BC)
  15. 15Who measured the circumference of the Earth in ancient times?
    Eratosthenes (3rd century BC)
  16. 16Who proposed a heliocentric model in 260 BC?
    Aristarchus of Samos
  17. 17Who discovered axial precession?
    Hipparchus (2nd century BC)
  18. 18When did magic squares first appear?
    Around 190 BC in China
  19. 19When was Heron's formula discovered?
    60 AD by Hero of Alexandria
  20. 20Who studied spherical triangles around 100 AD?
    Menelaus of Alexandria
  21. 21When were negative numbers first accepted as numeric?
    210 AD in the Chinese text 'The Nine Chapters on the Mathematical Art'
  22. 22What numeral system developed in Gupta-era India?
    The Hindu-Arabic numeral system with place-value notation (by 4th century)
  23. 23When was the decimal separator developed?
    By the 5th century in India
  24. 24Who gave a new symbol for zero around 499 AD?
    Aryabhata
  25. 25Who discovered Bezout's identity around 499 AD?
    Aryabhata
  26. 26Who described the notion of inertia in 525 AD?
    John Philoponus in Byzantine Egypt
  27. 27When did Brahmagupta state arithmetic rules for zero?
    628 AD
  28. 28Who provided an explicit solution to the quadratic equation in 628?
    Brahmagupta
  29. 29Who invented symbolic mathematical notation adopted across India and Europe?
    Brahmagupta (628 AD)
  30. 30Who discovered Snell's law in 984?
    Ibn Sahl

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