Java sea

We have crossed several lines in this journey--the Equator, the international dateline, the anti-meridian line and the Wallace line. The Wallace Line? What's that?
Alfred Wallace was a self taught naturalist who studied plants and animals in Indonesia, Singapore and Malaysia He found examples of species making physical adaptations to their environments. This was evidence that Darwin needed to support his theory of evolution Since he was a contemporary of Charles Darwin the two communicated frequently by letter and Darwin cited Wallace's findings in publications.
But Wallace also noted major differences in the flora and fauna on a line that runs through Indonesia and between Borneo and Sulawesi. Asian species were on one side and Australian on the other. The reason? When the supercontinent Gondwana separated from other land masses its different soil supported a different environment. Hence the Wallace line.Read more