Explanation

• The term Geography was first used by the Greek scholar Eratosthenes.
• He lived in the 3rd century BC (around 276–194 BC).
• He is also known as the “Father of Geography”.
• He calculated the circumference of the Earth with remarkable accuracy.
• His work laid the foundation of modern geographical studies.

Last verified on 02-05-2026

Explanation

• The famous book "Al-Qanun" (The Canon of Medicine) was written by Abu Ali Sina.
• It is also known as Avicenna. 
• The book covers medicine, diseases, and treatments.

Last verified on 27-04-2026

Explanation

• The conqueror of Spain was Tariq ibn Ziyad.
• He led the Muslim army in 711 AD and began the conquest of the Iberian Peninsula.
• He defeated the Visigothic ruler King Roderic at the Battle of Guadalete.
• His landing place is famously known as Jabal al-Tariq (Gibraltar).

Last verified on 25-04-2026

Explanation

• Jabir ibn Hayyan, known as the "father of chemistry."
• He was an Arab Chemist.
• Composition of Alchemy was written by Jabir Bin Hayyan.

Notable ideas:

• Use of organic substances in chemistry
• Sulfur-mercury theory of metals
• Science of the balance
• Science of artificial generation

Last verified on 07-02-2026

Explanation

• Polio Vaccines: Developed to prevent poliomyelitis, a viral disease causing paralysis.
• Jonas Salk (US, 1950s): Created the first inactivated (killed) polio vaccine; tested on himself and family in 1953; officially used in 1955.
• Albert Sabin (1961): Developed the live attenuated (weakened) oral polio vaccine.
• Recent Campaigns: Israel launched a polio vaccine drive in April 2022 after 1988 efforts.

Last verified on 03-04-2026