The World's first University was established in Takshashila(part of pre-partition India) in 700BC.

The first railway bridge was built over Thane Creek in 1854.

Playback singing was first introduced in the Indian Cinema in 1935 in the movie - Dhoop Chaon.

The first inter-city railway was built between Bombay and Surat, and was completed in 1864.

Kissan Kanhaiya was the first Indian color film that got released in 1937

On January 26th, 1926, scientists and press at the Royal Institution in London received the first public demonstration of the TV.

March 4, 1774 - First sighting of Orion Nebula by William Herschel.

MArch 4, 1789 - In New York City, the first United States Congress meets, putting the Constitution of the United States into effect.

March 5, 1968 - U.S. launches Solar Explorer B, aka Explorer 37 from Wallops Island to study the Sun.

March 5, 1912 - Italian forces are the first to use airships for military purposes, using them for reconnaissance behind Turkish lines.

March 7, 1926 The first successful trans-Atlantic radio-telephone conversation took place, between New York City and London.

March 7, # 1876 - Alexander Graham Bell is granted a patent for an invention he calls the telephone (patent # 174,465).

20 May, 1983 – First publications of the discovery of the HIV virus that causes AIDS in the journal Science by Luc Montagnier and Robert Gallo individually.

20 May, 1927 – At 07:52 Charles Lindbergh takes off from Roosevelt Field in Long Island, New York, on the world's first solo non-stop flight across the Atlantic Ocean, touching down at Le Bourget Field in Paris at 22:22 the next day.

21. AP State animal – Black Buck

22. Fastest flying bird – Japanese swift

23. Sri Ram Sagar project has been constructed on the river Godavari

24. The first hydroelectric power plant in India was set up at – Shivasamudram

25. First education minister of India – Maulana Abul Kalam Azad

26. First Viceroy of India – Lord Canning

27. The system of budget was introduced in British India in 1860

28. Coldest place in the world – Siberia

29. The world’s longest continuous border is the one between the USA and Canada

30. How many countries are members of the UN – 192