Nature’s Most Brutal Predators

Killer turtles with poison spears! Invaders of the slime glass fortress! The ballistic torpedo shark! These creatures sound like they came from a B-movie, but they are real, and they are dangerous. We humans simply ignore them, because we can't see them and barely know about them. These are protists, mostly single-celled organisms that are neither animal, plant, bacteria, or virus, but are the ancestors of them all. Now they feed on their descendants, with an amazing variety of weapons that are hard to believe come from a single cell. The prey they feed on are also quite small, and some protists are even beneficial to humans by controlling the species they eat. Kurzgesagt introduces us to three of the weirdest predatory protists to show what an amazing world lies underneath us while we don't pay attention. This video contains a sponsor message from 3:47 to 5:04, and the last minute is promotional. (via the Awesomer)