Abraham Poincheval 
 
 During his solo performances, Abraham Poincheval pushes back his physical and mental limits. As with the giant bottle, inside which Abraham Poincheval is currently going up the river Rhône, inhabitable sculptures in which, or on which, he has lived for several days, will be scattered throughout the spaces of Palais de Tokyo. So there is that flow, that coming and going, between myself and the stone.” 
 
 A few weeks after he emerges from the rock, Poincheval will sit inside a glass encasement and incubate chicken eggs with his body heat until they hatch. Abraham Poincheval attempts for the first time to live inside a rock for a week, thus taking his experimentation of enclosure and isolation to another level. By replacing an animal, he will experience a gestation time, varying between 21 and 26 days.
– A French artist has kicked off a weeklong stay inside a 13-ton boulder. Sounds awful, right? Well, it's only the start of what Abraham Poincheval calls "an inner journey to find out what the world is." After seven days confined to a sitting position in a limestone rock shaped like an egg at Paris' Palais de Tokyo museum—a feat that began Wednesday—Poincheval will spend 23.5 hours a day sitting on chicken eggs in order to hatch them, a process that's expected to take three or four weeks. While it certainly won't be a comfortable endeavor, Poincheval should generally know what to expect. He's previously spent eight days buried underground, a week on top of a 65-foot pole, and two weeks inside a stuffed bear, reports AFP. Poincheval says he's been preparing for months for the "Stone" performance—with the goal "to feel the aging stone inside the rock," he tells Quartz—and has all the kinks worked out. In addition to some padding, according to one witness, he'll also have access to air, a toilet, an emergency phone line, and a heart monitor as he munches on dried meat, soup, and other liquids. Once outside the egg, he'll eat plenty of ginger—allowing his blood vessels to expand, increasing body heat—to help him keep the chicken eggs at a minimum of 98 degrees while inside a glass encasement at the museum in a performance dubbed "Egg." After the eggs hatch, the chicks will "go and live with my parents," Poincheval says. (This performance art was probably less comfortable.)