All humans originated in Africa, except the ones from Mesopotamia.
No, our prehuman ancestors that appeared a million or more years ago through the first modern humans that appeared about 100000 years ago only went from place to place by walking on their own two feet. Humans did not begin domesticating any animals other than dogs until shortly after the end of the last ice age, about 12000 years ago. Dogs were domesticated about 15000 years ago, to assist hunter-gather peoples. But humans cannot ride on the backs of dogs. The first animal domesticated that humans rode on the backs of to get from place to place more quickly was the horse, this did not happen until about 5500 years ago in what is now the Akmola Province of Kazakhstan. These people were fully modern humans (in no way "early humans") that first domesticated and rode horses.
The early humans of Australia are believed to have migrated from Africa around 60,000 years ago through Asia. This migration is thought to have taken place in several waves, with the ancestors of the indigenous Australians being among the first to arrive.
It is most likely that humans first appeared in Africa because the earliest fossils have been found there. As to why Africa would be a place for humanity to begin their humble beginnings, it is hard to say. It could possibly be because the climate of Africa used to be more temperate than it is now, and the Sahara Desert wasn't always a desert, which meant that you could sustain life in central Africa without being in the proximity of the Nile River.
The first humans are believed to be part of the species Homo sapiens, which emerged in Africa around 300,000 years ago. These early humans were hunter-gatherers who had developed the ability to use tools and communicate with complex language.
Early humans first appeared in Africa. The oldest known fossils of early human ancestors, such as Ardipithecus and Australopithecus, have been found in East Africa, indicating that Africa is the continent where early humans originated.
India
to get out of trouble
There is no way to absolutley know where the first humans where. As of now however the evidence collected from human remains and scientific studies show the country of Ethiopia as place of the first modern humans.
Because humans discovered that it was a real useful fuel.
There is no certain time or place where they start, they have been around almost as long as humans have.
Humans cannot destroy space, time, matter, and energy. Seeing as how none of these entities can be destroyed in the first place it shows that human can essentially destroy anything.
The Fertile Crescent
Nomads.
The first portion of carbohydrate digestion in humans takes place in the mouth as amylase in the saliva starts to break down sugars.
The first humans were likely dark-skinned, but the specific skin color of the very first humans is not definitively known.
Robots can take place of humans in handling dangerous substances
The Moon is the only place exception Earth where humans have gone.