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 discovered Insulin?
Who invented the hot air balloon?
Who invented the thermos flask?
Who invented radar?
Who discovered electron?
Edward Jenner discovered vaccine for which of the following disease?
Who developed the theory of relativity?
Who invented the Centigrade scale?
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