This document lists major scientific discoveries in chronological order, including Edmund Halley calculating Halley's comet's orbit in 1682, Joseph Priestley discovering oxygen in 1755, and Albert Einstein publishing his theory of relativity in 1915. Some other notable discoveries mentioned are Benjamin Franklin inventing the lightning rod in 1752, Wilhelm Röntgen discovering X-rays in 1895, and Jonas Salk perfecting the polio vaccine in 1952. In total, over 20 significant scientific breakthroughs made from 1665 to 1988 are identified.

1. WELCOME

2. MAJOR DISCOVERIES IN SCIENCE

3. • Edmund Halley observed Halley’s comet and
calculated its orbit and period (1682).
• Benjamin Franklin invented the lighting
Conductor (1752).
• Joseph Priestly discovered Oxygen (1755).
• Wilhem Rontgen discovered X-rays (1895).
• E.Rutherford discovered Alpha particles (1906).
• Michael Faraday discovered Electromagnetic
induction (1831).
• Alessandro volta constructed the first Voltaic cell
(1793).

4. • Einstein published his theory of Relativity
(1915).
• Klaus von kiltzing discovered Quantum half effect
(1977).
• James Bradley discovered the Aberration of light
(1727).
• Robert Hooke discovered Cell (1665).
• Sir. Alexander Flemming discovered Antibiotic
(1928).
• Jonas Salk perfected Polio vaccine (1952).
• Kary Mullins developed in Vitro gene cloning
(1988).

5. • Karl von Frisck studied the dance of Honey
bees for Communication (1973).
• Yuri Gagarin orbited the earth in the
Artificial satellite (1961).
• F.G. Banting and C.H. Best developed
Insulin (1922).
• Henry Becquerel discovered Rodio activity
(1896).
• Joseph Lister used carbolic acid as antiseptic
(1867).
• Galileo invented Telescope, discovered
Sunspots (1610-1613).

6. THANK YOU