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Teenagers are well known for doing [crazy / crazily] things. It seems that once a child becomes [the / a] teen, they take a lot [more / many] risks. Some of these are dangerous and lead to injury, or [worsen / worse] . A new study of young chimpanzees may explain risky behaviour [at / in] children. The study is from researchers at the University of Michigan in the USA. They studied over 100 wild chimpanzees in a national park in Uganda. The chimps [ranges / ranged] in age from 2 to 65 years. The researchers looked at [what / how] the animals swung through trees. The youngest chimps [seamed / seemed] to do more dangerous things, like letting go [off / of] branches and letting themselves fall. Older chimps took fewer risks and made sure they gripped branches [firm / firmly] .

Lead researcher and [anthropology / anthropologist] Laura MacLatchy suggested why children and [youngster / young] chimpanzees take more risks. She believes it is because they are [at / that] an age when parents supervise [them / him] less. Parents and carers often stop very young children from doing things that might [cause / causing] injuries. However, young teens have more freedom and want [to / and] try new and risky things. Professor MacLatchy said the risk-taking was the same for male and female chimps and [humans / human] . The website ScienceAlert said that "some anthropologists argue for increasing children's access [for / to] thrill-seeking play, [including / include] the old-fashioned monkey bars, as a way [to / for] help them develop motor skills and skeletal strength".