The Avengers XXX 2 Porn Parody (2015)most perplexing mysteries are often hiding in plain sight.

You know, those mundane curiosities like why do gas prices always end in 9/10ths of a cent? And are yawns actually contagious?

In Mashable's new Facebook Watch show Insignificant Mysteries, we explore just that and more. Tune in every Thursday at 3 p.m. ET as we take a deep dive into the most mystifying enigmas of everyday life, the tiny mysteries that we've come to accept as the norm... only to discover they're anything but ordinary.

And be sure to check out new episodes below.

Episode 101: Bun on the Fourth of July

Ever wonder why hot dogs come in packs of 10, when hot dog BUNS come in packs of 8?  Is it a secret government conspiracy? Today, we find out.

Episode 102: Button Pusher

Why does it seem like “Door Close” buttons on elevators never really work?  IS IT BECAUSE THEY DON’T?  Are they just a smokescreen for something far more sinister?  Find out onInsignificant Mysteries.

And don't forget to follow for more episodes of Insignificant Mysteries here.