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Major Developments in Hominin Evolution - Coggle Diagram
Major Developments in Hominin Evolution
Reasons for Complex Language Development:
Encephalization Quotient (EQ): Formula comparing brain sizes & holds body size constant.
Socialization Theory: Group Socialization = more cognitively complex than most other behaviour types.
Complex Language Theory: Accurate & direct desire expression.
Helps humans "dissemble" (conceal true motives).
Other major language advantages:
Discuss things that are not present.
Talk about the past & future.
Discuss abstract concepts.
Collective information storage
Obligate Bipedalism Theories:
Tool use (traditional theory).
Thermoregulation (controlling core body temperatures).
Locomotion efficiency (energy usage).
Reduced body hair cover:
Tied to the development of whole body transpiration (sweating).
2 Mammal sweat gland types:
Sebaceous (secrete oil).
Eccrine (secrete h2o).
Humans = more eccrine glands.
More effective cooling system than other mammals.
Tied to hominids moving from forest to open spaces.
Increased exposure to sunlight = darker skin tone.
Early hunting ideas in Hominin evolution:
Bipedalism
Freed up
Encephalization
Increased cooperation & communication = larger brain.
The "Hunting Hypothesis"
Behavioural Changes:
Division of labor based on sex.
"Men hunted & women had babies.
Food Sharing
Hunters share their kill among their camp mates.
females dependent on food supply = expalin 2 notable human weaknesses.
Constant sexual reception among human females.
Concealed ovulation & monogamy.
Physical Changes:
Reduction in Canine Size.
Response to tools replacing big canines.
Increased body hominin size.
More effective at hunting prey.