While cats may not read clocks, they use a sophisticated blend of internal biological cues and environmental "scent markers" ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Getty Images As a pet parent, I often wonder what my cats think about throughout the day.

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Getty Images As a ...