One exasecond equals 10^18 seconds, which translates to approximately 31.7 billion years. Cosmologists and theoretical physicists use this scale to model the extreme long-term evolution of the universe. Because the estimated age of the universe is only about 13.8 billion years, a single exasecond covers more than double the time since the Big Bang.
Heard on the job
Proton decay models predict a half-life measured in billions of exaseconds.