Scientists have changed their of when adolescence ends and starts. Adolescence is that difficult when children develop into adults. It was thought to coincide with our teenage years. However, scientists from the University of Melbourne have redefined . They say it can start at the of 10 and continue to the age of 24. Puberty used to occur around the age of 14, but because of improved health and , puberty can now start at the age of 10, especially in the developed world. Likewise, the age for when adolescence ends has been increased. This is because we stay in longer, and delay responsibilities like marriage, parenthood and getting a .
The scientists published their in the "Lancet Child and Adolescent Health" . They say society needs to change laws to take into account the of the research. Professor Susan Sawyer said: "Although many adult legal start at age 18, the of adult and responsibilities generally occurs later." The researchers say youth services could be extended to the age of 25. However, this could be in many countries around the globe. There is a big in the legal age at which nations recognize adulthood. Children become adults at the age of 15 in Indonesia, Myanmar and Yemen. In Singapore, Zambia and Honduras, the age is 21.