PBS
The Invisible Barrier Keeping Two Worlds Apart
In between two of the islands of Indonesia, there’s an ancient line that is both real and…not real.
SciShow
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.
Crash Course
Crash Course History of Science #22: Darwin and Natural Selection
Darwin and Wallace are at the heart of understanding evolution and natural selection. Watch as Hank talks about their wonderful (if not seasick-inducing) trips around the world and how theories of evolution "evolved" through history....