![Runner Things #2879: Funny Running Posts [21-40]](http://www.fuelrunning.com/quotes/wp-content/uploads/2014/08/funny-running-posts-21-40-title.jpg)
![Runner Things #2878: Funny Running Posts [1-20]](http://www.fuelrunning.com/quotes/wp-content/uploads/2014/08/funny-running-posts-1-20-title.jpg)
The human eye is so sensitive that if the Earth were flat, you could spot a candle flickering at night from up to 30 miles away.
 | 13 Types Of Fish To Avoid Eating |
 | Scientists Reveal What The Perfect Penis Looks Like |
 | 5 Ways To End Treadmill Boredom |
 | Great Ways To Pay It Forward |
