The test of a time machine intended to skip five minutes forward takes a turn when the subject does not return as planned.
Michel Siffre, 85, Dies; Descended Into Caves to Study the Human Mind
Michel Siffre's 63-day cave experiment significantly advanced the study of circadian rhythms, demonstrating the human internal clock operates independent of external time cues.
California City Leaders End Cloud-Brightening Test, Overruling Staff
Residents' fears lead to halting of climate intervention experiment in Alameda, despite expert assurances.