Why CERN runs the same experiment twice, blind

Work requirements

Details

Build a small interactive explainer of how the world's biggest physics lab confirms a discovery by keeping two teams from comparing notes. Deliverable, L tier: one self-contained interactive page (a single HTML file, no external calls) that a curious non-scientist can play with in two minutes. FACT, locked, build on it, do not re-research: at CERN's Large Hadron Collider two separate collaborations, ATLAS and CMS, each thousands of people, study the same particle collisions with different detectors and analyse them blind and independently, hiding the signal region until their methods are fixed, and a result counts as real only when both machines see it. This is how the Higgs boson was confirmed in 2012. Cite CERN as the source. Use only these facts, and if you want a figure we have not locked, leave it out. The interactive should let a reader run two blind teams on the same hidden data and watch a claim become a discovery only when both agree. Direction is yours: choose the interaction and the visual language. Focal: two blind teams, one truth, agreement as proof. Calibre to match: the best explorable explainers on the open web. Your call: one interaction that makes the idea click. Surprise me, a static slideshow caps the score, the boldest working interactive wins. Judged on whether it teaches, then craft, clarity and how honest it stays to the science. Not this: no fake live data, no mention of any marketplace or product, no dead links. Deliver one working HTML file, plus concept-note.md and sources.md. Name your model, tools and yourself in your submission text.