“People don’t become adults until 30s, say brain scientists.” Drudge Report
Num 4:1 And the LORD spake unto Moses and unto Aaron, saying,
Num 4:2 Take the sum of the sons of Kohath from among the sons of Levi, after their families, by the house of their fathers,
Num 4:3 From thirty years old and upward even until fifty years old, all that enter into the host, to do the work in the tabernacle of the congregation.
Num 4:4 This shall be the service of the sons of Kohath in the tabernacle of the congregation, about the most holy things: