Explanation

• Al-Biruni was a famous Muslim mathematician, astronomer, and geographer.
• He calculated the Earth's radius using trigonometric principles and measurements of the angle of dip from a mountain.
• His estimated radius was approximately 6,339.6 km, which was remarkably close to the modern mean radius of about 6,371 km.
• He lived from 973 CE to 1048 CE.

Last verified on 09-11-2026

Explanation

• Peregrine Falcon is the world’s fastest bird.
• It can reach speeds of over 300 km/h (186 mph) during a hunting dive called a stoop.
• Its scientific name is Falco peregrinus.
• It is known for its exceptional speed and hunting ability.

Additional information:

• Ostrich → Largest and Fastest running bird (up to 70 km/h / 43 mph)

Last verified on 01-07-2026

Explanation

• Ibn Sina compiled The Canon of Medicine around 1025 AD.
• It is a five-volume medical encyclopedia written in Arabic.
• The book remained a standard medical reference in Europe and the Muslim world for centuries.

Last verified on 03-04-2026

Explanation

Etanercept is a TNF-alpha inhibitor used in patients with rheumatoid arthritis who do not respond adequately to conventional DMARDs.

Explanation

ARBs (Angiotensin II Receptor Blockers) are used as an alternative to ACE inhibitors in RAAS (Renin-Angiotensin-Aldosterone System) modulation, especially in patients who develop a cough with ACE inhibitors.