When did the first human exist? And when did they start populating the earth?

Answer 1

There is no answer to this, as "humans" are evolved, and are still evolving. When did the first catfish appear? There is no answer.

Answer 2

Thanks and What did humans evolve from?

Answer 3

http://humanorigins.si.edu/education/introduction-human-evolution

Answer 4

So six million years ago?

Answer 5

I just want to know when did humans start populating?

Answer 6

six million years ago is a good estimate. No one wrote it down.

Answer 7

So nothing is accurate? But estimated

Answer 8

Let say the humans started populating six million years ago, how come there is only over 7 billion people? I mean if you calculate the population today should be in 100 trillions

Answer 9

You're not accounting for

~ poor hygiene and understanding of germs
~ diseases and illnesses
~ pandemics
~ infant mortality rates
~ wars
~ accidents

... and all sorts of other reasons for humans' deaths.

Answer 10

I am accounting those too and it still doesn't add up to it.

Answer 11

it's still no where near

Answer 12

"modern" humans (us) arrived on the scene about 30 - 50 thousand years ago
around the end of the last ice age

there was limited interbreeding with the Neanderthals -- who were on the way out

there have NOT been people like us around for 6 million years

plug a different time into your calculation

Answer 13

Apparently you didn't read the site that bobpursley posted. Our human ancestors appeared about 6 million years ago.

Answer 14

the key here is "modern" humans (like us)
Isaiah is using 6 million in some population growth scenario and getting weird results
he's not interested in the start of the genus , he want to count people