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The Invisible Line in the Indian Ocean

There’s an invisible line between two groups of islands in the Indian Ocean with two totally different animal populations. It took three branches of science to figure out why it exists.

Hosted by: Olivia Gordon
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Sources:
http://evolution.berkeley.edu/evolibrary/article/history_16
https://www.britannica.com/science/biogeography
http://discovermagazine.com/1997/aug/mrwallacesline1198
http://science.sciencemag.org/content/341/6151/1182.full
https://www.britannica.com/science/biogeographic-region
https://genographic.nationalgeographic.com/migration-to-australia/

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Images:
https://en.wikipedia.org/wiki/File:Alfred_Russel_Wallace_-_Project_Gutenberg_eText_14558.jpg
https://upload.wikimedia.org/wikipedia/commons/0/02/1878_Darwin_photo_by_Leonard_from_Woodall_1884_-_cropped_grayed_partially_cleaned.jpg
https://en.wikipedia.org/wiki/Wallace_Line#/media/File:Wallace-line1.jpg

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