Ptolemy introduced the ______________ which described the absolute perception of the universe with the Earth as its center which was thought to be true by most of the people at that time.

His book The Descent of Man was so impressive yet very controversial.

He is Father of psychoanalysis

During this stage, the infant's primary source of interaction occurs through the mouth,

It is the ethical component of the personality and provides the moral standards by which the ego operates.

It defines all past events and memories, though at times inaccessible to us no matter how hard we try to remember to bring things up

It is the earliest age of information technology

It is the era of vacuum tubes and punch card like the ENIAC

They build the first suspension bridge; which allowed travelers to cross both rivers and dangerous ravines.

Ancient city of Machu Picchu

They valued the cacao beans highly and made it as part of their tribute to their Gods

Ayurveda, a system of traditional medicine that originated here before 2500 BC, is still practiced as a form of alternative medicine

The great Indian Mathematician who calculated the value of pi at 3.1416

Acupuncture

Father of Algebra

Pioneered the science of experimental medicine

The first physician to conduct clinical trials.

The oldest known mathematical artifact

Cradle of Civilization

Vaccination, autopsy, limb traction, broken bone setting are contribution of which Intellectual Revolution