With the James Webb Space Telescope now revealing galaxies that formed just a few hundred million years after the Big Bang, I'm puzzled about how much we can actually trust our models of the early universe. Those redshift measurements seem solid, but they rely on assumptions about dark energy and galaxy evolution that might be off. Is this just a calibration problem we'll sort out, or could it mean our whole picture of cosmic origins needs a rethink? What do you think—are we on the verge of a major physics overhaul, or is this just incremental data that fits existing theories with some tweaking?