National Geographic : 1973 Jan
How the continents 200 MILLION YEARS AGO: A single supercontinent-which geologists now call Pangaea, "all lands" -is washed by a universal ocean, Panthalassa. 135 MILLION YEARS AGO: The northern landmass, Laurasia, has split from the southern, known as Gondwana or Gondwanaland. This has also divided, with India heading north toward Eurasia. 65 MILLION YEARS AGO: The North Atlantic and Indian Oceans have taken shape (far right), and the South Atlantic widens. Australia is still attached to Antarctica. DRAWNBY LEOB. ZEBARTH COMPILEDBYGEORGEW. BEATTY TODAY: Australia has torn from Antarctica, Laurasia has finally separated into North America and Eurasia. India has careened into Eurasia, thrusting up the Himalayas. 50 MILLION YEARS FROM NOW: Australia plows north. The Atlantic and Indian Oceans continue to widen; the Mediterranean shrinks. California west of the San Andreas Fault, detached from the mainland, slides toward the Aleutian Trench.