This is an unprecedented history of the human race, and it's giving us valuable data about how diseases are inherited, how people migrate, and there's a team of scientists at MIT right now studying the world family tree.
这在人类史上史无前例， 它给我们疾病如何遗传的重要资讯， 人类如何迁移， 而现在麻省理工有个科学家团队正在 研究这个世界家族树。