Who became the first person to have more than 400 million followers on Instagram?

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Cristiano Ronaldo dos Santos Aveiro GOIH ComM is a Portuguese professional footballer Cristiano Ronaldo has set another record as his Instagram followers reached the 400 million mark while Selena Gomez officially became the first woman on Instagram to surpass 400 million followers 

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Abu Marwan Ḥayyanwas an Arab Muslim historian from Al-Andalus.  Born: 987  Cordoba, Al-Andalus (now Spain) Died: 1075 (aged 87–88)

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Originally published: 1965 Author: John Joseph Saunders

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Mustafa Kemal, later known as Ataturk He was born in Thessaloniki (also called Salonika) on July 12, 1881 1st President of Turkey  In office  29 October 1923 – 10 November 1938 Died: 10 November 1938 (aged 57),  Istanbul, Turkey Resting place: Anıtkabir, Ankara

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Carl Brockelmann is the author of "History of the Islamic Peoples". He was a professor at the universities in Breslau, Berlin, and, from 1903, Konigsberg. He is best known for his multi-volume Geschichte der arabischen Litteratur (first published 1898–1902) ('History of Arabic literature') 

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Shelley's "Mont Blanc" is written in blank verse, Which means unrhymed iambic pentameter.

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The new name of Leningrad is Saint Petersburg. In a referendum held in 1991 The city of Saint Petersburg was founded by Tsar Peter the Great on 27 May 1703. It became the capital of the Russian Empire 

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The idiom "against one's grain" means " against one's nature." It indicates something contrary to a person's natural inclination, feelings, or beliefs

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Ernest Rutherford was a New Zealand-born British physicist who came to be known as the father of nuclear physics.

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The first open-heart surgery in India was performed on February 16, 1961 By Dr. K.N. Dastur at BYL Nair Hospital in Mumbai. He used a heart-lung machine developed with the help of engineers at the National Steel Company. The surgery was performed on a 19-year-old girl named Hemlata