I’m afraid you have caught GigaPhysics in a slightly awkward, but temporary, transitional state. If you have been here before, you might notice that the labs’ user interfaces have changed some. The lab guides have not yet been updated, but they should be done soon within a few days. (It is May 11, 2026 as I write this.) Other design and interface refinements should come soon as well.
You may also notice than the only content currently on GigaPhysics is the virtual labs. Other parts of the prior site were not utilized much, and so they have been discontinued permanently.