Explanation

Wilhelm Wundt was a German physiologist. 

Wilhelm Wundt is known as one of the fathers of modern psychology.

Wundt  was the first person ever to call himself a psychologist. 

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Explanation

Eratosthenes was the first person to calculate the Earth's radius in the 3rd century B.C.E.

He was a Greek astronomer who lived in Alexandria, Egypt.

Eratosthenes's calculation of the Earth's radius was 6,366 km, which is close to the modern value of 6,378 km.

Explanation

• From 1901 to 2022, the United States received the most 400 Nobel Prizes.
• The country with the second highest number of Nobel Prizes is the United Kingdom with 138.
• Germany has  the second highest award at 111 and is also the third country with over 100 Nobel laureates.
  

Explanation

Tansu Çiller (born 24 May 1946) is a Turkish academic, economist, and politician.

She was served as the 22nd Prime Minister of Turkey from 1993 to 1996.

She was Turkey's first and only female prime minister.

Explanation

The United States is the largest oil producer, followed closely by Saudi Arabia and Russia.

Canada is also a significant oil producer, with the majority of its production coming from the oil sands in Alberta.

United States: 18.60 mb/d

Saudi Arabia: 11.01 mb/d

Russia: 10.50 mb/d

Canada: 5.29 mb/d