random sample more accurate than census

After most Iranians converted to Islam, they kept and revived their Persian language and culture. This process, called Persianization, also involved Arab and Turkic peoples.

Many fundamental physical equations work almost equally well whether time runs forward or backward. Yet broken cups do not spontaneously reassemble, and memories point toward the past rather than the future. The usual explanation involves entropy: the universe began in an extraordinarily low-entropy state, allowing disorder to increase. Why it started that way remains a profound mystery.