Which country on 23 October 2017 signed the Paris agreement on climate change, leaving the United States and Syria as the only two countries holding outto sign this global climate pact?
Who invented the vacuum pump?
Who invented bluetooth?
Who discovered the colour photography?
Who invented the electrocardiogram (ECG)?
Who discovered Sodium?
Who invented the waterproof raincoat?
Who discovered Penicillin?
Who discovered electricity and invented the lightning rod and bifocals?
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