Development of the human body used to approximately judge a child's age based on physical development. Puberty is the process of physical changes through which a child's body matures into an adult body capable of sexual reproduction. It is initiated by hormonal signals from the brain to the gonads: the ovaries in a girl, the testes in a boy. In response to the signals, the gonads produce hormones that stimulate libido and the growth, function, and transformation of the brain, bones, muscle, blood, skin, hair, breasts, and sex organs. Physical growth—height and weight—accelerates in the first half of puberty and is completed when an adult
Subsidiary Body of Scientific and Technological Advice Subsidiary Body of Scientific and Technological Advice The Subsidiary Body of Scientific and Technological Advice (SBSTA) is a subsidiary body of the United Nations Framework Convention on Climate Change (UNFCCC) Conference of the Parties (COP). It meets at least twice a year to advise the COP on matters of science, technology and methodology. It is designed to be open to participation by all parties and to be multidisciplinary. It advises on guidelines for improving standards of national communications and emission inventories. Its roles defined in Article 9 of the UNFCCC are: (a) Provide assessments of the state of scientific knowledge