<p>A Geology proffessor recently told me that around 200,000 years ago, when homo sapiens emerged, that <em>&quot;...all of civilisation can now fit on the width of a single strand of human hair.&quot;</em></p>
<p>I am perplexed! What did he mean by this?</p>

CC BY-SA 4.0
2021-02-20T21:38:55.117Z
Could be a comment on how short a time humans have been around geologically speaking. If you make a timeline of the 4.5 billion year history of the earth, and it’s like 5 feet long, 200,000 years is about one human hair width
Ben51
CC BY-SA 4.0
2021-02-20T21:43:09.300Z
@Ben51 Ah yes, you must be absolutely correct. He was walking 100 meters with each step being 50 million years. Makes perfect sense. Thanks for the clarification!
Jonathan
<geology><earth-history><evolution>
puzzling statement on earth history!
Jonathan
# puzzling statement on earth history!

(Asked by: username_0 on 2021-02-20)

A Geology proffessor recently told me that around 200,000 years ago, when homo sapiens emerged, that *"...all of civilisation can now fit on the width of a single strand of human hair."*

I am perplexed! What did he mean by this?

**Tags:** geology, earth-history, evolution

> **Comments:**
> **username_1**: Could be a comment on how short a time humans have been around geologically speaking. If you make a timeline of the 4.5 billion year history of the earth, and it’s like 5 feet long, 200,000 years is about one human hair width  
> **username_0**: @username_1 Ah yes, you must be absolutely correct. He was walking 100 meters with each step being 50 million years. Makes perfect sense. Thanks for the clarification!  

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## 0 answers

