Quantum
The core experiments of the very small, where a particle refuses to sit in one place, or to have agreed anything in advance.
LIVE 
The Casimir Effect CASIMIR 1948 · INST-33 Two uncharged metal mirrors in vacuum, pushed together by the vacuum itself: fewer electromagnetic modes fit between them than outside, and the gradient of that deficit is a force measured to better than 1%. The Gap view thins the standing waves out one by one as you tighten the separation, force arrows growing by the exact fourth-power law; the Modes view draws the 1948 counting argument as an honest cartoon; the Curve view lays the measured law over the four real campaigns, Sparnaay's ±100%, Lamoreaux's 5%, Mohideen's 1%, Decca's sub-1%, with the unresolved Drude/plasma thermal dispute as a switch; the Ledger prices the gap's negative energy against INST-12's warp bill on a log ladder: about sixty orders short, with the Ford-Roman inequalities rationing even that. The force is measured; the negative energy is an inference; what it proves about the vacuum is yours to read. LIVE 
Quantum Eraser SCULLY–KIM · INST-31 Tag which slit a photon took and the double-slit fringes die, no one has to look. Erase the tag and they only come back once you sort the hits by the eraser's two channels: one a fringe, the other its exact anti-fringe, while the combined screen stays flat. Even when the choice is made after the photon has landed. Step through the three configurations, flip the view from the combined screen to the sorted channels, and switch the marker and 45-degree analyzer yourself. No retrocausation here: no signal travels back, only a correlation is revealed. LIVE 
Uncertainty Principle HEISENBERG–KENNARD · INST-09 Pin a particle's position and its momentum runs wild, and the reverse. Position and momentum are Fourier transforms of each other: squeeze one and the other must fan out. The product has an exact floor, ℏ/2, and a Gaussian sits right on it. LIVE 
Quantum Tunnelling GAMOW–GURNEY · INST-08 Roll a particle at a wall it can't climb and a sliver comes out the far side, every time. A live Schrödinger solve, with the exact transmission T(E) below. The effect that lights the Sun and reads your flash memory. LIVE 
Entanglement EPR–BELL · INST-07 Make two entangled particles and send them apart; measure one and the other answers in lockstep, too tightly for any "they agreed in advance" story. Flip to a local-realist source and it cannot keep up. LIVE 
Double-Slit QM · INST-06 Fire one particle and it lands as a single dot; fire thousands and they stack into stripes only a wave can make. Try to catch which slit it took, and the stripes vanish.
The Casimir Effect CASIMIR 1948 · INST-33 Two uncharged metal mirrors in vacuum, pushed together by the vacuum itself: fewer electromagnetic modes fit between them than outside, and the gradient of that deficit is a force measured to better than 1%. The Gap view thins the standing waves out one by one as you tighten the separation, force arrows growing by the exact fourth-power law; the Modes view draws the 1948 counting argument as an honest cartoon; the Curve view lays the measured law over the four real campaigns, Sparnaay's ±100%, Lamoreaux's 5%, Mohideen's 1%, Decca's sub-1%, with the unresolved Drude/plasma thermal dispute as a switch; the Ledger prices the gap's negative energy against INST-12's warp bill on a log ladder: about sixty orders short, with the Ford-Roman inequalities rationing even that. The force is measured; the negative energy is an inference; what it proves about the vacuum is yours to read. LIVE Quantum Eraser SCULLY–KIM · INST-31 Tag which slit a photon took and the double-slit fringes die, no one has to look. Erase the tag and they only come back once you sort the hits by the eraser's two channels: one a fringe, the other its exact anti-fringe, while the combined screen stays flat. Even when the choice is made after the photon has landed. Step through the three configurations, flip the view from the combined screen to the sorted channels, and switch the marker and 45-degree analyzer yourself. No retrocausation here: no signal travels back, only a correlation is revealed. LIVE Uncertainty Principle HEISENBERG–KENNARD · INST-09 Pin a particle's position and its momentum runs wild, and the reverse. Position and momentum are Fourier transforms of each other: squeeze one and the other must fan out. The product has an exact floor, ℏ/2, and a Gaussian sits right on it. LIVE Quantum Tunnelling GAMOW–GURNEY · INST-08 Roll a particle at a wall it can't climb and a sliver comes out the far side, every time. A live Schrödinger solve, with the exact transmission T(E) below. The effect that lights the Sun and reads your flash memory. LIVE Entanglement EPR–BELL · INST-07 Make two entangled particles and send them apart; measure one and the other answers in lockstep, too tightly for any "they agreed in advance" story. Flip to a local-realist source and it cannot keep up. LIVE Double-Slit QM · INST-06 Fire one particle and it lands as a single dot; fire thousands and they stack into stripes only a wave can make. Try to catch which slit it took, and the stripes vanish.