Hippocrates is known as the father of modern medicine for his contributions to the field, including his emphasis on observation and experience, and his belief that diseases have natural causes rather than supernatural ones.

Pythagoras is credited with developing the Pythagorean theorem, which states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.

Aristarchus of Samos was the first Greek philosopher to propose the heliocentric model of the solar system, which places the Sun at the center and the Earth and other planets orbiting around it.

The Antikythera Mechanism is an ancient Greek analog computer used to predict astronomical positions and eclipses decades in advance. Its creator remains unknown.

Archimedes developed the method of exhaustion to calculate the area of a circle by dividing it into an infinite number of triangles and summing their areas.

Hippocrates is believed to have written the Hippocratic Oath, a code of ethics for physicians that is still used today.

Democritus and Leucippus proposed the atomic theory of matter, which states that all matter is composed of tiny, indivisible particles called atoms.

Archimedes invented the screw pump, a device that uses a helical screw to lift water or other fluids.

Pythagoras is credited with discovering the golden ratio, an irrational number approximately equal to 1.618, which is often found in nature and art.

Galen developed the theory of humors, which states that the human body is composed of four humors: blood, phlegm, yellow bile, and black bile. The balance of these humors was believed to determine a person's health or illness.

Eratosthenes developed the method of triangulation to measure the distance to the Moon by observing it from two different locations on Earth.

Ctesibius invented the water organ, a musical instrument that uses water pressure to produce sound.

Aristarchus of Samos was the first Greek philosopher to propose the heliocentric model of the solar system, which places the Sun at the center and the Earth and other planets orbiting around it.

Hero of Alexandria invented the steam engine, a device that uses steam to generate power.

Pythagoras is credited with discovering the golden ratio, an irrational number approximately equal to 1.618, which is often found in nature and art.