An aquarium is self-perpetuating functional unit. Therefore, it is known as ecosystem. Since the fishes and plants and others are added by man, so it is known as artificial ecosystem.

If a CFL breaks, some of the mercury that’s contained in the bulb will evaporate into the air.

March 2019, the Special Olympics World Games were held in the Middle East for the first time in Abu Dhabi, United Arab Emirates (UAE).

The Nobel Peace Prize 2018 was awarded jointly to Denis Mukwege and Nadia Murad "for their efforts to end the use of sexual violence as a weapon of war and armed conflict."

The book 'Matoshree', based on life of Maratha Queen Ahilyabai Holkar, authored by the Lok Sabha Speaker Sumitra Mahajan.

The Farakka Barrage was created by India in 1975 to divert water from the Ganges River to the Bhagirathi-Hoogly river system. The barrage diverts water from one of the most populated basins in the world, the Ganges-Brahmaputra-Meghna basin. There are 54 transboundary rivers between India and Bangladesh.

The India-Sweden Collaborative Industrial Research and Development Programme will work towards addressing a range of challenges around smart cities and clean technologies among others. The programme was co-funded by Indian Department of Science and Technology (DST) and Swedish agency Vinnova.

The Great Pyramid of Giza (also known as the Pyramid of Khufu or the Pyramid of Cheops) is the oldest and largest of the three pyramids in the Giza pyramid complex bordering present-day El Giza, Egypt.

Resolving power is defined as the ability of a microscope to distinguish two closely spaced objects as being distinct from each other. The numerical aperture is highest with the oil immersion lens. As the numerical aperture of the lens increases, the resolving power increases.