"Scientists spot the telltale tick of a time crystal in a kid's toy" (2018) https://newatlas.com/time-crystal-found-crystal-growing-kit/54469/ https://newatlas.

"Scientists spot the telltale tick of a time crystal in a kid's toy" (2018) https://newatlas.com/time-crystal-found-crystal-growing-kit/54469/ https://newatlas.com/time-crystal-found-crystal-growing-kit/... Time Crystal: https://en.wikipedia.org/wiki/Time_crystal https://en.wikipedia.org/wiki/Time_crystal /q discrete time crystal "retrocausality" https://www.google.com/search?q=discrete+time+crystal+%22retrocausality%22 https://www.google.com/search?q=discrete+time+crystal+%22ret... Delayed choice quantum eraser: https://en.wikipedia.org/wiki/Delayed-choice_quantum_eraser https://en.wikipedia.org/wiki/Delayed-choice_quantum_eraser From https://news.ycombinator.com/item?id=28402527 https://news.ycombinator.com/item?id=28402527 : > one must perform electrodynamic engineering in the time domain, not in the 3-space EM energy density domain. And from https://news.ycombinator.com/item?id=35877402#35886041 https://news.ycombinator.com/item?id=35877402#35886041 : > Physical observation (via the transverse photon interaction) is the process given by applying the operator ∂/∂t to (L^3)t, yielding an L3 output ... > FWIU electrons are most appropriately modeled with Minkowski 4-space in the time-domain; (L^3)t Retrocausality > Physics: https://en.wikipedia.org/wiki/Retrocausality#Physics https://en.wikipedia.org/wiki/Retrocausality#Physics