Qutb ud-Din Aibak, a former general of Muhammad Ghori, established the Slave dynasty in 1206 following the death of his master. As the first Sultan of the Delhi Sultanate, he laid the groundwork for Islamic rule in northern India. His reign was relatively short, but he is credited with initiating the construction of major architectural landmarks, including the Qutb Minar, which remains a symbol of the era.

Abu Abdullah al-Battani was a preeminent astronomer and mathematician during the Islamic Golden Age. His work significantly refined the calculation of the solar year and the precession of the equinoxes. His astronomical tables and mathematical treatises, particularly his contributions to trigonometry, were highly influential in both the Islamic world and medieval Europe, where his works were translated and studied for centuries by later scientists.

Al-Biruni was a polymath who made significant contributions to various scientific fields, including physics and astronomy. He conducted observations regarding the nature of light and sound, noting that light travels significantly faster than sound. His empirical approach to these physical phenomena was highly advanced for his time, solidifying his reputation as a pioneering scientist.

Ibn Battuta was a famous Moroccan explorer who traveled extensively across the Islamic world and beyond. He arrived in India during the 14th century and served in the court of Muhammad bin Tughluq for several years before continuing his journey to China. His travelogues provide significant historical insights into the Delhi Sultanate.

Nasir al-Din al-Tusi was a polymath who made significant contributions to mathematics and astronomy. He developed the 'Tusi couple,' a geometric construction used to explain planetary motion, and conducted extensive observations that refined the understanding of lunar and planetary mechanics during the Islamic Golden Age.

Shah Waliullah, a prominent Islamic scholar, is historically noted for writing to Ahmad Shah Abdali, the ruler of the Durrani Empire. He requested Abdali's intervention to address the political instability in India and to curb the growing dominance of the Maratha Empire, which culminated in the decisive Third Battle of Panipat in 1761.

Sir Syed Ahmad Khan, a prominent 19th-century Indian Muslim reformer and educationist, was born in Delhi on 17 October 1817. He is best remembered for establishing the Muhammadan Anglo-Oriental College, which later became the Aligarh Muslim University.

This famous medical maxim is attributed to the ancient Greek physician Hippocrates. It reflects the principle that in cases of severe illness, aggressive or drastic medical interventions may be necessary to save the patient's life, a concept that has influenced medical ethics and practice for centuries.

Aristotle was a polymath and student of Plato who made extensive contributions to biology, logic, and ethics. He is often considered the father of zoology for his systematic classification of living organisms. His intellectual influence was profound, and his role as the tutor to Alexander the Great helped shape the young king's worldview, which later influenced the spread of Hellenistic culture across the ancient world.

George Washington was the first President of the United States. In both the 1789 and 1792 elections, he received a unanimous vote from the Electoral College. He remains the only president in American history to have been elected without facing any formal opposition from other candidates.