Explanation

James Watson is an American molecular biologist, geneticist, and zoologist.

In 1953, he co-authored with Francis Crick the academic paper proposing the double helix structure of the DNA molecule. 

ND13-07-2023

Explanation

On March 7, 1876, Graham Bell invent the telephone.

Graham Bell made the first-ever telephone call to his partner, Thomas Watson.

while

In 1880 the first phone book was published

Alexander Graham Bell demonstrated the telephone to Queen Victoria in 1878

ND16-8-2023

Explanation

 The first handheld mobile phone was demonstrated by Martin Cooper on 3 April 1973,

Using a handset weighing c. 2 kilograms (4.4 lbs).

In 1979, Nippon Telegraph and Telephone (NTT) launched the world's first cellular network in Japan.

Explanation

Marie Curie is best known for her work in radioactivity

She also discovered the elements radium and polonium.

Her pioneering research in radioactivity earned her two Nobel Prizes, one in Physics (1903) and one in Chemistry (1911).

Explanation

Robert Peary became the first person to reach the North Pole in 1909.

Robert Peary was an American explorer. 

The North Pole of the Earth is located in Arctic Ocean.

Distance from south to North Pole is called Longitude.

Explanation

Malaria is caused by Plasmodium parasites.

The parasites are spread to people through the bites of infected female Anopheles mosquitoes, called "malaria vectors.

Explanation

Marco Polo was a Venetian merchant, explorer, and writer who traveled through Asia along the Silk Road between 1271 and 1295

The famous traveler “Marco Polo” belonged to Italy

Marco Polo  was also nicknamed Milione

Marco Polo was born in 1254 in Venice

Marco Polo  Died: on January 8, 1324, in Venice, Italy

the Italian title of Marco Polo's book was Il libro di Marco Polo detto il Milione, which means "The Book of Marco Polo"

ND10-3-2023

Explanation

Explanation

King Abdulaziz Al-Saud, founder/first king of Saudi.

Al-Saud: 1882

Al-Saud: 1953

Establishment of Saudi: 1932

Explanation

Brahmagupta, an astronomer and mathematician from India used zero in mathematical operations like addition and subtraction.

Aryabhatta introduced zero in 5th century.

Brahmagupta introduced zero in calculations in around 628 AD.