Torpor, a state where mammals turn down their metabolic rate, can be triggered by factors like activating the nuclear receptor PPARA.

“torper is just the idea of essentially turning down your metabolism and so there are animals who will go into this torper for like uh like just a few hours sometimes um and and this is seen pretty widely in the uh birds do this too actually but but that like a mouse in the lab if you give them um uh if you give them a something that activates a nuclear receptor called PP or Alpha they'll start having these torper Bots that last like eight hours long”