Which happened earlier: Newton publishes Principia or Faraday discovers electromagnetic induction?

Question 1

Which happened earlier?

A Newton publishes Principia ✓ Earlier

B Faraday discovers electromagnetic induction

Newton publishes Principia (5 July 1687) came before Faraday discovers electromagnetic induction (29 August 1831)

Question 2

Which happened earlier?

A X-rays discovered

B Pasteur develops pasteurisation ✓ Earlier

Pasteur develops pasteurisation (20 April 1864) came before X-rays discovered (8 November 1895)

Question 3

Which happened earlier?

A DNA double helix structure published

B Penicillin discovered ✓ Earlier

Penicillin discovered (28 September 1928) came before DNA double helix structure published (25 April 1953)

Earlier #157