It also highlights scientific discoveries not yet fully understood and still under study in the mid-1980s .
Planet Earth explores geoscience and how discoveries of the early and mid-1980s were revolutionizing mankind 's understanding of the Earth 's past , present , and future .
Planet Earth also highlights scientific discoveries not yet fully understood and still under study in the mid-1980s .
Planet Earth explores geoscience and how discoveries of the early and mid-1980s were revolutionizing mankind 's understanding of the Earth 's past , present , and future .