Explanation

China has successfully landed a robot on the surface of Mars on 15 May 2021.

China has become the third country after Russia and the United States of America in history

The rover 'Zhurong' will spend around 90 Martian days on the planet.

A Martian day is around 24 hours and 39 minutes.

This rover is named after the mythical Chinese god of fire.

Explanation

Apple Inc. is an American multinational technology company .

Founded: April 1, 1976, Los Altos, California, United States

Headquarters: Cupertino, California, United States

Founders: Steve Jobs, Steve Wozniak, Ronald Wayne

Explanation

• William Harvey discovered the circulation of blood.
• He was the first physician to completely describe systemic blood circulation.
• Famous book: De Motu Cordis (On the Motion of the Heart and Blood) (1628)
• He is known as the Father of Circulation of Blood.

Additional information:

• Birth: 1578
• Death: 1657

Last verified on 23-06-2026

Explanation

• Christopher Latham Sholes invented the modern typewriter (patent 1868).
• Made the QWERTY keyboard (1873).
• First mass-produced: Remington No. 1 (1873).

Explanation

• Wilhelm Conrad Rontgen discovered X-rays
• He was discovered on 8 November 1895.
• He got the Nobel Prize in Physics in 1901.

Additional questions

• The penetrating power of X-rays depends on their frequency

Last updated 26-07-2026 by NA

Explanation

• First Polio Vaccine Introduced: 1955
• Developer: Dr. Jonas Salk
• Type: Inactivated Polio Vaccine (IPV)
• Oral Polio Vaccine (OPV): 1961
• Developer of OPV: Dr. Albert Sabin

Last verified on 20-07-2026

Explanation

• Full Name: Vinton Gray Cerf
• Known as: Father of Internet
• Born: 23 June 1943
• Major Contribution: TCP/IP protocol development
• Award: National Medal of Technology (1997)

Last verified on 20-06-2026

Explanation

• Christopher Columbus was born in Genoa, Italy.
• He accidentally reached the Americas in 1492.
• He was searching for a sea route to Asia.
• First "discovered" the Americas on October 12, 1492
• Completed four Spanish-based voyages across the Atlantic Ocean

Explanation

• Charles Babbage is known as the Father of the Computer.
• He designed the more advanced Analytical Engine, which featured a "Mill" (CPU) and a "Store" (memory).

Additional information:

• He was an English polymath.
• Born: 26 December 1791 London, England
• Died: 18 October 1871 (aged 79) London, England

Last updated on 09-03-2026

Explanation

• Neil Armstrong was the first human to set foot on the Moon on July 20, 1969, during NASA's Apollo 11 mission.
• His famous words upon landing were, "That's one small step for man, one giant leap for mankind."

Additional information:

• Neil Alden Armstrong was died on August 25, 2012.
• He was born on August 5, 1930.

Last verified on 01-04-2026