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Health care systems are major employers in most affluent nations.
Homo Erectus
An extinct species of hominid that lived from the end of the Pliocene epoch to the later Pleistocene, known for upright walking.
Homo Habilis
An early species of human characterized by its use of stone tools, dating back to around 2.8 million years ago.
Brain Size
A measure of the volume or mass of the brain, often related to an organism's cognitive abilities, but not the sole determinant of intelligence.
Dentition
Refers to the development, arrangement, and number of teeth in animals and humans.
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