Explanation

Christopher Columbus born 1451, Italy

Died May 20, 1506, Valladolid, Spain

Master navigator and admiral whose four transatlantic voyages opened the way for European

Explanation

Jimmy Donal Wales (born August 7, 1966), also known on Wikipedia by the pseudonym Jimbo

Wikipedia is the largest and most-read reference work in history.

Date launched of Wikipedia: January 15, 2001

Programming language of Wikipedia: PHP

Wikipedia was created by: Jimmy Wales, Larry Sanger

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Explanation

Calculating the radius of the earth over a thousand years ago required a lot of imagination.

The 10th-century Persian mathematician Abu Rayhan al-Biruni used simple trigonometric results to estimate the radius and circumference of the Earth

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Explanation

The concept of vaccination was pioneered by Edward Jenner.

He is credited with developing the first smallpox vaccine.

Discovery Date: Jenner's groundbreaking work began in 1796. 

Explanation

Radioactivity was discovered by Henri Becquerel in 1896

They discovered radioactivity proving that the uranium emitted radiation without an external source of energy such as the Sun

Marie Curie with her husband Pierre Curie, coined the term radioactivity 

in 1903, Henry Becquerel shared the Nobel Prize for Physics with Pierre and Marie Curie

Ernest Rutherford did many experiments studying the properties of radioactive decay (alpha, beta, and gamma)

Explanation

In 1714, Dutch scientist  Daniel Gabriel Fahrenheit invented the first reliable thermometer,

using mercury instead of alcohol and water mixtures.

In 1724, he proposed a temperature scale which now bears his name.

Galileo made his first telescope in 1609

Barometer Inventor: Evangelista Torricelli

Steam engine Inventor: Thomas Savery

Microscope Inventor: Zacharias Janssen

Explanation

Marconi invented Radio.

Radio was invented in 1895.

Guglielmo Marconi was an Italian inventor. 

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Explanation

John Vincent Atanasoff invented the first digital computer in 1930. 

The inventor of the first Digital Computer belonged to the country: USA

John Vincent Atanasoff died in 1995.

Digital computer:

The Digital Computer operates on a Binary system

Explanation

Greenwich main time is 5 hours behind Pakistan standard time.

Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London, counted from midnight.

Greenwich Mean Time was established in 1884

Explanation

 A biosensor is a sensor exploiting a bio-molecule 

It is used to measure the presence of a certain substance in a liquid.

Additional information:

For example,

biosensors include those used to detect viruses in the blood or measure glucose levels in the blood.

These are mainly point-of-care applications, where direct results are important.