How Our Deadliest Parasite Turned To The Dark Side
Season 4 Episode 17 | 8m 6s | Video has closed captioning.
Around 10,000 years ago, somewhere in Africa, a microscopic parasite made a huge leap. With a little help from a mosquito, it left its animal host - probably a gorilla - and found its way to a new host: us.
Problems Playing Video? | Closed Captioning