"After the great adventure of the mine, and what the mine has brought to this territory, we wondered what our peopleshould do...? This is my fiftieth year underground, so for fifty years, my life has been between the light and thedarkness of the caves" - says the speleologist Ubaldo Sanna, the son of a mining family from Sardinia, as weenter the cave of Su Mannau, where he has been practicing speleology since 1973.

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What is the relationship between people and the underground? The underground is inaccessible, inhospitable,dark, and damp. It is a place where we bury what we want to hide, where we imagine legends of monstrousbeings, and where we fear getting trapped. At the same time, it is also where we find the most preciousminerals for humanity, where we bury our loved ones, or where we find part of our history. "Below ground, weput what we fear and want to abandon, and what we love and want to preserve" (MacFarlane, 2019).

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Sota Terra is a performance created between Mataró (Catalonia) and Cagliari (Sardinia) which, during itscreation process, collaborated with two choirs to explore the relationship that humans have with theunderground and the planet. Our daily lives make us walk quickly and keep looking ahead , but what happensif we change our perspective and look downward? We will discover a planet that moves at geological time, andits history is difficult for humanity to grasp. Our lives are summarized in a centimeter of stalactite.

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We invite you to become cyborg explorers, equipped with headlamps and cybernetic bracelets (which vibratewhen the planet has seismic activity), and leave the surface to slip down beneath the earth.​