Logically? Of course, it is possible. Previous civilisations could have been human or otherwise. Maybe Darwin was wrong. Maybe we are all aliens. The possibilities are endless, and probably mostly unknown to humans.
Ashes to ashes, dust to dust. Energy is not lost or destroyed, it just changes, just like human "civilisations" do. The earth will correct itself. Mother Nature knows best
Chat with our AI personalities
prehistory
Before agriculture we were hunter/gatherers.
neolithic age
One must consider that by 'discovered' you mean by humans. Since it is not possible to communicate with animals or geographies, we cannot know how diamonds were regarded, considered, acknowledged -- or used -- before being discovered by humans.
The land in river valleys is very fertile. It is easier to herd animals when the land is flat. Water is a very essential thing for humans and before wells it was easiest to get it from rivers. Water can provide power, and assist tr