There's more to airplane toilets than meets the eye. Image: Bildagentur-online / Contributor / Getty Images Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. There’s nothing quite like the sound of an airplane toilet flushing. But that incredibly loud sucking sound is actually something of an engineering marvel. These toilets flush, with no water, while zooming along at 500 miles per hour.  In this episode of Ask Us Anything by Popular Science , we get into all the smelly details of how airplane toilets actually work. Ask Us Anything answers your most outlandish, mind-burning questions—from the everyday things you’ve always wondered to the bizarre things you never thought to ask. So, yes, there’s a reason we can’t remember being babies and no, not all cats hate water . If you have a question for us, send us a note . Nothing is too outlandish or too ordinary. This episode is based on the Popular Science article “ How do airplane toilets work?…