How Animals Tell Time Is Still a Mystery, But We Do Know They Measure It
[html]Animals don’t wear watches, but they may be able to keep track of time. Learn how they do it.[/html]
Source: How Animals Tell Time Is Still a Mystery, But We Do Know They Measure It (http://ht**://www.discovermagazine.c**/planet-earth/how-animals-tell-time-is-still-a-mystery-but-we-do-know-they-measure-it)