Is it possible mankind exsisted before?

[Tibe]

A little forum bump.

I got a very wierd theory. This might be an utterly stupid assumption. But I got curious. The Earth is 4.5 billion years old. Man(or manish being) could potentially evolve and build a very large society(somewhat similar to ours) multiple times during that timeline and even the slightest effect they had and proof of their existence could easly desinegrate and be buried in less than million years. Is such a thing possible or am I just high again?

[Latvian]

i have theory that you evolved from dinosaurs

[Prpavi]

Yes it's posslible, do you really think history as they teach us now is completely accurate? We know shit 

[Sparvico]

http://en.wikipedia.org/wiki/Planetary_habitability
http://www.uea.ac.uk/mac/comm/media/press/2013/September/habitable-life-on-earth
http://www.thenakedscientists.com/HTML/questions/question/3443/

“Looking back a similar amount of time, we know that there was cellular life on earth. We had insects 400 million years ago, dinosaurs 300 million years ago and flowering plants 130 million years ago. Anatomically modern humans have only been around for the last 200,000 years – so you can see it takes a really long time for intelligent life to develop.

“The amount of habitable time on a planet is very important because it tells us about the potential for the evolution of complex life – which is likely to require a longer period of habitable conditions.

Now that's not to say it isn't possible, but so far absolutely zero (credible) evidence has been found to support such a theory, and a good deal has been found to support the current evolution theory.

[Utrakil]

I really like the theory that mankind had  a significant time living in the ocean and on land.
The human body shows some features that are really good adaption to the water.
1. the nose is much more streamlined and the opening shows in the oposite movementdirection when swimming (apes or monkeys nostrills are much more opened to the front).
2. unlike other monkeys humans can bend their back backwards. this is really essential for a good underwatermovement.
3. we lost our fur
4.we have rests of webs between our fingers.
5. our hipbones rotated compared to other apes which doesn't only allow us walking on two legs but also straighten the whole body for better swimming.
6. babies still have the reflex to hold their breath when submerged.
7. we can see underwater and produce saltwater for our eyes.
8. there are legends around the globe about waterdwellers(mermaids, atlantis)

there might have been more but I can't recall them.
I know some of it is far fetched but I like the Idea. There are only very few mamals that are as good underwater as we are. And those mamals live parttime or fulltime in the water. For a landmamal we are exeptional good swimmers.
If you need any Idea of what humans are capable look for apnoe diving.

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edit: Just found this: http://en.wikipedia.org/wiki/Aquatic_ape_hypothesis
       haven't read it jet.

[Leshma]

You've got hella high, instead of your favorite porn from the 90s you've digged up a DVD with last episode of re-imagined Battlestar Galactica.

[darmaster]

assassin's creed¿ queequack

[Tibe]

Everything turns into dust or something else eventually. I was in the idea of more the line of that they died out entirely and all evidence of their existence just vanished in a mil+ years. That time had passed so much, that its not possible to find evidence of anything. That we arent related to them in any way. But they just simply exsisted before us. Another civilized sentinel beings, who built stuff etc. That they(and possibly other life) evolved from zero and completely died out along with all the evidence.

Now that I did look it up, im noticing that yea....pretty slim chance. Cause dinosaurs exsisted like 230mil years ago and we can easly find evidence of them. And the Earth started being habitable at all around 2 billion years ago. When I thought of it, I kinda considered a....well less slim chance. Still, kinda cool, dont you think...

[FleetFox]

Mate you need to do some research about ancient civilisations, particularly around the Persian region and the Indian sub-continent. Some of the worlds most civilised societies were found here 5000+ years old, and they had much more advanced technology previously thought (for example very modern style irrigation techniques with canals, as well as sewers and advanced earth systems).

Depending on what values you count as being "civilised" some of these societies could be argued to be more so that modern variants. Sure you can ask how do we know this, but a lot of evidence can be attained through archaeology for example. Like I said if you are interested go do some research, its fascinating stuff and really helps you to critically analyse the current systems we live in now and whether they can be realistically changed for the better.

Cheers
FleetFox

[Tibe]

Ye, archeology works is it was 5000+ year. Im talking about a billion years, time that it takes for remains of things to turn into oil or something or so deep inside the earth its unreachable. Like way way before ancient civilizations.

[Casimir]

Possible yes, probable no way.

[Nightmare798]

A little forum bump.

I got a very wierd theory. This might be an utterly stupid assumption. But I got curious. The Earth is 4.5 billion years old. Man(or manish being) could potentially evolve and build a very large society(somewhat similar to ours) multiple times during that timeline and even the slightest effect they had and proof of their existence could easly desinegrate and be buried in less than million years. Is such a thing possible or am I just high again?

Might be, There could have been a very advanced race of humans on earth before it colided with mars, and became as it is now. However, that is just a wild theory, and there is no way to back it up.

Write a book about it! Maybe one day, people will build churches and statues in your name and hail you as a herald of an extremely advanced race of gods, who you can promise people to return, and that they will create a boundless paradise, but only if they diligently work and pray in your name. Does that sound familiar?

[Xant]

This thread is extremely bizarre

[Tibe]

Possible. My lack of proper understanding of how evolution, earths age, weed and forming of oil works could have something to do with it.

And screw you latvian! Im a shapeshifting lizard hellbent on ruling societies of man, not a dinosaur.

[Franke]

I'm not an expert concerning paleontology, but I do not think that the proof of the existence of humans would completely vanish within just 1 million years, given the fact that we know about dinosaurs who died out like 65 million years ago.

If something similar to mankind had existed earlier, I do not think that in a direct evolutionary competition it would have been replaced byy reptiles/dinosaurs as, as we know, mankind can be pretty stubborn when it comes to maintaining their place in the sun.
 A possible theory could be that this first mankind would have been wiped out by a disaster or sth similar with the rptiles taking over the empty spot later on. But if this would have been the case, I wonder if we wouldn't have a proof of this disaster (As I said, I know little about paleontology and don't know what is possible today).