Carl Sagan on ancient Greek mathematician Eratosthenes

Login to rate this video.

You can place this video on your website by inserting the (X)HTML code below:

Embed code:
<iframe src="" width="400" height="330" frameborder="0"></iframe>

You can email this video to your friends by entering their addresses below:

Your information:

add Add another recipient

Human verification:

People who liked this video also liked

The 5 Most Dangerous Pistols on the Planet
1087 Days in Just 15 Minutes - Growing Plant Time Lapse COMPILATION
Colored balls elevator. Particle fluid. Music. Molecular Script. Video 4K
2019 Tasmanian Tiger Photo
Budgie Balancing Trick
Margaret Thatcher Climbs Over A House


6 comments posted so far. Login to add a comment.

Expand all comments

Picture of dopkop29 achievements

+6 1. dopkop commented 9 years ago

That man walking 800km better have walked in a straight line... :D
Picture of Judge-Jake53 achievements

+16 2. Judge-Jake commented 9 years ago

#1 Turns out he did. Just imagine walking in a straight line for 497 miles and using that measurement to give a near perfect figure of 7% of the entire earth. Incredible feet and feat. ;)
Picture of dushan56 achievements

-2 3. dushan commented 9 years ago

- this guy sounds like principal skinner from sipsons
- noooooo, zi aliens told him, there is no chance someone could measure planet size with a stick
Picture of beerholder29 achievements

+6 4. beerholder commented 9 years ago

Imagine measuring 800 km by counting your steps and going

79633-hey steve
7963...darn it, better start again. :x
Picture of msavio00830 achievements

+4 5. msavio008 commented 9 years ago

And some people say we are smarter now
Picture of BangkokJarek26 achievements

+5 6. BangkokJarek commented 9 years ago

he was lucky there were no christians back then or he'd get tortured and then burned to death