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Stephen William Hawking was born on 8th January 1942 and died on 14th March 2018. London:The famous physics professor  Stephen William Hawking  has warned that mankind is facing the foremost dangerous time in it's history today.He said that  the earth  today is facing huge challenges like  natural process , overpopulation, epidemic diseases.'We have the technology to destroy  the planet  on which we live and haven't yet developed  the flexibleness   to escape  it.Perhaps during  some  hundred years from now,we will have built colonies amid the celebrities,but  directly ,we have  only one  planet  which  we must work together to shield it'.Hawking wrote recently within the Guardian newspaper. Hawking died at