The world’s second oldest Geological Survey came into existence in Calcutta in the year 1851.
The first modernised post office was established in Calcutta in 1858.
The Indian Botanical Gardens at Shibpur, near the Bengal Engineering College, is home of the largest banyan tree in the world (the banyan tree with the biggest girth), according to the Guinness Book of Records.
The first Maternity ward in Calcutta was inaugurated on 19th April,1882, in the Medical College Hospital. The first patient was admitted on 17th July.
Ronald Ross discovered the virus while working in Presidency General Hospital on 20th August,1897. For this remarkable achievement, he was awarded the Nobel prize in 1902.
Kolkata was the original headquarters of IBM Corporation in India before shifting to Bangalore on its return to operations in the country.
The Calcutta Mounted Police was born in 1912. They were virtually the body-guards of the Viceroy and the Governor. In later years, the 'Mounted Police' became indispensable for combating sudden violent scarmishes and reinstating peace and order in the anarchy-prone areas. At the inception horses for the 'Mounted Police' were brought from Australia. These horses were cared and looked after meticulously but of when they grew old, they were shot dead mercilessly. Then, they were sent to the zoo for being fed by the carnivores.
Kolkata based accountant Amitava Banerjee is the first single man in India (and South Asia) to father an in-vitro fertilised baby
In spite of the establishment of Medical College in 1835, the hospital started operating thirteen years later. On 1st December,1852, this hospital was inaugurated with 500 beds.
The Calcutta Women’s Football League is the oldest league for women in India. It was started by the Indian Football Association in 1993.