no one knows for sure, best guesses I've read puts it at about 110 billion. again this is the number of people who have ever lived. the number of people alive today is close to 7 billion. i only mention this because the previous answer to this question was 6.7 billion.
It is impossible with our present knowledge to get an accurate answer. We just don't know enough about the origin of homo sapiens as well as the the average life spans of our ancestors. Unless you are a creationist you know that humans are the latest evolution in many species from the ape branch. Some say the species we call humanity spawned about 2 million years ago although archaeologists are still finding bones of our fore fathers dating back even further.
If you class humans as people living in society then the estimate is about 60 billion. If you want to believe that the nomadic people that roamed the African tundra throwing spears at mammoths and arguing with neanderthals are the same as us genetically, then the estimate is about 110 billion.
106 Billion, give or take.
In my knowledge, the microorganisms lived first on earth.
The plants, insects, fish and dinosaurs lived on earth during the late Cenozoic era. Now all that is left on the earth are the fossils.
It is produced from creatures that lived on Earth in the past.
They have or are fossilizing.
Human geography is the study of people, where they lived, cultures, work, food, homes, and religion. Physical geography is the study of earth's land, features, landforms, mountains, valleys, plains, climate, environment, nonliving things, living things, plants, soil, and animals.
It is probably older than human beings have lived on earth.
Earth is the home planet of human beings. No one discovered it. Humans have always lived here.
dnosaurs, strange reptiles, fish, and bacteria. very vague, sorry
where do many scientist b human like beings lived
About 3,000,000,000 changes in human beings live
About 3,000,000,000 changes in human beings live
It is possible. Human beings a few centuries ago lived without them. Human beings a century from now will do so again!
Nasty, brutish and short
Human beings have never lived underwater as part of their daily life. Humans were created on good old firm ground.
I don't know but im not sure.... i think its Venus or Mars Mars is by far the most Earth-like but "people" as human beings could not have evolved there.
That really depends on when you believe the first human being was born. many people believe this was about 10,000 BC, the number you are looking for is around 20 Billion 7 Billion are currently alive now.
All humans who have ever existed have lived on Earth. Until a few centuries ago people did not know Earth was a planet, but they still lived here.