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

Explanation

Vasco da Gama was a famous explorer and navigator from Portugal.

Additional information:

• Born: 1460, Sines, Portugal
• Died: 1524, Cochin, India
• Famous Achievement: First European to reach India by sea in 1498
• Significance: Opened direct maritime trade between Europe and Asia

Last verified on 15-01-2026

Explanation

• Isaac Newton (1642–1727) was an English physicist and mathematician.
• He formulated the laws of motion and law of universal gravitation.
• His work laid the foundation for classical mechanics.

Last verified on 02-04-2026