Up Next
0
Roosters' internal clock makes them crow: Study
According to a study conducted in Japan, an internal clock, not sunlight, drives roosters to crow at the crack of dawn.
Share
Roosters' internal clock makes them crow: Study
According to a study conducted in Japan, an internal clock, not sunlight, drives roosters to crow at the crack of dawn.
Date: 3/19/13
Views: 2139
Video by:  MSN News/Newsy
 
Follow us:
Loading... 1 of 167
Today's Most Watched Videos
Related Videos
Loading... 1 of 56