2007-01-21 15:40:07 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
1. Opposable thumb. Move your thumb back and forth. This is something the homonids cannot.
2. Walking Upright
3. Use of tools.
I am pretty sure number one is correct, but I can't be sure about the others.
2007-01-21 15:44:21 · answer #1 · answered by nicewknd 5 · 0⤊ 0⤋
Reduction of musculature related to the mandible, allowing for the cranium to develop towards a lighter structure with a larger braincase.
This is likely related to evolution of weaker teeth, which also allowed for a more regular surface. This surface, coupled with a simplification of the larynx and increased gracile complexity of the tongue aided in the development of complex vocal communication.
Intensified secondary sexual characteristics, increase in size of genitalia (as compared to other primates) well beyond reproductive needs, and nearly constant sexual receptivity played one of the most important roles in the development of human social behavior.
2007-01-21 18:46:03 · answer #2 · answered by Sp. Gr. 0.98 3 · 0⤊ 0⤋
You can add a small mouth (and dentition, i.e., teeth) due to the invention of cooking, which made it possible to eat foods that would otherwise be inedible and extract nutrients from foods that would otherwise be impossible to digest. A smaller mouth left more room for a bigger brain, since both were competing for head space. This is the latest theory on how the invention of cooking changed us. (Just one more item to add to your list.)
2016-05-24 12:46:37 · answer #3 · answered by Anonymous · 0⤊ 0⤋
purely guessing but here it goes:
1. standing upright
2. use of and creation of tools and fire
3. social grouping and traditions of early family/tribe setting including knowledge of their existence and relation to each other and the world around them
2007-01-21 15:46:32 · answer #4 · answered by Anonymous · 0⤊ 0⤋
1) Moving from the forests to grassland made us walk upright
2) Starting to eat meat provided extra nutrients that lead to us developing a larger brain
3) Use of tools lead to everything else
2007-01-21 15:44:04 · answer #5 · answered by Anonymous · 1⤊ 1⤋
1. walking upright
2. developing more complex brain
3. developing language
4. tool making (?) many other non-human animals make and us tools too
2007-01-21 15:49:23 · answer #6 · answered by Chug-a-Lug 7 · 0⤊ 0⤋
climate changes, diet, cant think of anything else
2007-01-21 15:45:21 · answer #7 · answered by Anonymous · 0⤊ 0⤋
nothing . i dont think we changed much.....we just learned how to research.
2007-01-21 17:04:51 · answer #8 · answered by Anonymous · 0⤊ 0⤋