Zeptosecond. Apron – Redbubble

1 Zeptosecond. “Make every zeptosecond count.” A zeptosecond is the shortest unit of time ever measured―a trillionth of a billionth of a second―a decimal point followed by 20 zeros and a 1. Apron, also, t shirts, wall art, stickers, and home décor.