The Infinite Hotel, a thought experiment created by German mathematician David Hilbert, is a hotel with an infinite number of rooms. Easy to comprehend, right? Wrong. What if it’s completely booked but one person wants to check in? What about 40? Or an infinitely full bus of people? – This kind of reminds me of the famous Monty Hall Paradox and if you enjoy infinity check out this post on “Infinity Paradoxes“.