Through the years, April 21

On April 21, 1926, Elizabeth Alexandra Mary Windsor was born in London, destined to become the longest-reigning British Monarch. ( Image: Royal Family UK)

On 21 April 1994, Dr Alexander Wolszczan, a radio astronomer at Penn State, announced the first confirmed discovery of planets beyond our Solar System, offering the first unambiguous proof of the existence of extrasolar worlds. (Image: NASA)

On April 21, 1526, Babur's victory over Ibrahim Lodi, the then Sultan of Delhi, marked the rise of the Mughal Empire in India. (Image: NCERT)

April 21 also marks the 15th year of the Deepwater Horizon oil spill, where an oil rig exploded off the Gulf Coast, maiming the lives of 11 people and sending 134 million gallons of crude oil gushing into the ocean. The aftereffects are still being felt. (Image: AP)

Prince, who is remembered as one of the greatest musicians of all time, passed away today on April 21, 2016 (aged 57) from an accidental fentanyl overdose at his residence in Minnesota. His record-breaking studio album " Purple Rain" was released in June 1984. (Image: Instagram)

On April 21, 753 BC, Romulus is said to have founded Rome. From myth to might, this legendary act sparked the rise of one of history’s greatest civilizations. (Image: PTI)

On April 21, 1960, the capital of Brazil was shifted from Rio De Janeiro to Brasilia. The city is known for its urban planning and modernist architecture. (Image: Agencia Brasil)