TIL that Dogs are able to smell the difference between ground that has been recently stepped on vs undistributed ground, as foot steps release moisture from the soil and can damage vegetation which would release odors

https://en.wikipedia.org/wiki/Tracking_(dog)
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1gl3csf/til_that_dogs_are_able_to_smell_the_difference/