Question

2 scientists biography/social reformers/explorers who spent most of their lives to find solutions to some major problems/setbacks that mankind faced

Answer 1

Robert Hooke invented balance spring and a machine that cut teeth for cogs.

2. Benjamin Franklin invented electricity

3. Raja Ram Mohan Roy abolished sati pratha, caste system.

4. Swami Dayanand was against untouchability and child marriage.

5. Vasco da gama explored the route to India.

6.Neil Armstrong was the first man to walk on the moon.

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