This page contains a link to a flight simulator set inside a hypersphere, a project co-created by me and (good friend and software engineer) Isaac Dulin. A hypersphere (or three-sphere to mathematicians) is a higher dimensional analogue of a sphere. In math terms a sphere is the boundary of a three-dimensional ball, so a sphere is like the skin of a basketball and the ball is the air inside it. Likewise, a hypersphere is the boundary of a four-dimensional ball! Just like a sphere has a circle as an equator, a hypersphere has an equatorial sphere. Eventually this simulator will be a video game, but we've put this preview online now.
Before clicking the link below, you'll need these directions. Press W to go forward, S to go backward, and use your mousepad to change direction; you can also press Q to roll left and E to roll right, and some other keys will move in other directions. (The simulator won't work on a phone yet.) To exit the simulator, press the escape key twice. Here are two additional tips:
Due to the spherical geometry, sometimes things that are far away will appear to be large.
Try flying along the surface of the equatorial sphere (marked out by hexagons). Notice how it appears flat when you fly along it, but it appears round when you sit at the North or South Pole (the big blue and red balls).
Happy flying!