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homoerectus Upright man Homoerectus is an extinct species of archaic human from the Pleistocene, with its earliest occurrence about 2 million years ago. Its specimens are among the first recognizable
Wooden puppet doll, obeying master hand pulling the strings of dancing marionette. Concept of emotional manipulation, world conspiracy theories., control and dictatorship
Theory of relativity. physical formula. Black school board. E mc2
Student scientist writing physics equation on a book to solve a science or math problem in a classroom lab with a blackboard behind. Theory learning in university. Albert Einstein theory concept.
Concept of Practice, Practice, Practice write on sticky notes isolated on Wooden Table.

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