The age of majority in international research is determined by the

The age of majority in international research is determined by the laws, customs, and norms in the area in which the research will be conducted. The age of majority is the threshold of adulthood as recognized or declared in law. Hope this answers the question. Have a nice day.

It’s actually still in the u.s.

It depends on what you believe, if you’re christian that you would have been told that the first humans were created by god and that we’re all decedent's from adam and eve but scientist say otherwise