Most evidence of human existence has returned to the earth. Only in rare circumstances is any evidence preserved.

We've found remnants of wood structures in Africa that are over 150k years old.

Humans have walked this earth for a long time, but something changed in the last 10,000 years.

Agriculture lead to the first human population explosion.

We carried on this way for a few thousand years developing our skills as farmers and builders.

Then the industrial revolution happened.

We roughly 2X the population in a single century from 1800-1900 and then 4X the population in the 20th century.

Never before have there been so many of us building so many things at once.

We build with steel and concrete. Plastics that don't decay.

Even if a natural disaster wipes out 99% of the human population, evidence of this population explosion will last for eons.

We are living in unprecedented times in the history of our planet and our species.