Featuring 100 works by international designers and artists, “Unknown Unknowns,” an exhibition “whose boundaries are hazy and permeable” opens at Triennale Milano. Curated by astrophysicist Ersilia Vaudo, the show features new commissions from designer Irene Stracuzzi, architects SOM, and artist Refik Anadol. A fourth, Yuri Suzuki’s Sound of the Earth: Chapter 3 (2022, image), is a globe comprised of 300 speakers that play an ambient megamix of crowdsourced geotagged field recordings.