Speechless.

According to Garau, the sculpture doesn't not exist per se, rather it exists in a vacuum, Newsweek reports. "The vacuum is nothing more than a space full of energy," Garau explained. "And even if we empty it and there is nothing left, according to the Heisenberg uncertainty principle, that 'nothing' has a weight. Therefore, it has energy that is condensed and transformed into particles, that is, into us."
Source: Italian Artist Sells Invisible Sculpture for $18,000 | highsnobiety