Animals, they indulge in public sleep everyday. That’s what happens when the world is your bedroom. Of course, there are a few creatures who succumb to snooze sessions more than others.

As well as these nocturnes there are cathemeral animals that are active by both day and night, and an even smaller number of crepuscular animals that come out in the twilight of dusk and dawn.

This story appears in the October 2019 issue of National Geographic magazine. A naked mole rat. That was photographer Joel Sartore’s first model in 2006 when he began making studio portraits of ...

Though animals are likely capable of some forms of ... one thing's certain: Your pooping habits are far more interesting to ...