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Are we truly in control of our actions, or are we being manipulated by unseen beings? It’s an idea that is a standard trope of paranoid conspiracy theories, but in the above TED talk, science writer Ed Yong shows how mind control by parasites appears to be almost ubiquitous in nature. And if it happens to so many other species on Earth, then why not humans too…?

(I didn’t write this post, the Toxoplasma gondii did)