ঢাকা, মঙ্গলবার, ২১ আগস্ট ২০১৮ | ১২ : ৪৩ মিনিট

Stephen-Hawking1215: Pope Innocent III declares Magna Carta invalid
1787: Wolfgang Amadeus Mozart completes his violin and piano sonata in A K526
1891: Thomas Edison invents and patents motion picture camera
1991: Mikhail Gorbachev resigns as head of USSR Communist Party
2015: Physicist Stephen Hawking presents a new theory on black holes at a lecture at the KTH Royal Institute of Technology, Stockholm
2015: Facebook CEO Mark Zuckerberg announces that for the 1st time 1 billion people logged into Facebook

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