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World of bacteria - the science behind microorganisms | DW Documentary von DW Documentary   2 months ago

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Bacteria are everywhere: in the ground, in the water and in the air. There’s no creature on earth that’s not populated by bacteria.

Scientists are exploring the complex role of microorganisms. How great is the invisible power of bacteria? Bubonic plague, typhoid and tuberculosis: over the course of human history, we’ve fallen victim to countless diseases caused by bacteria. But only around one percent of known bacteria are pathogens. This documentary looks at the microorganisms that live in the bodies of living things - from tiny insects to mammals such as humans. Without bacteria, the human digestive, immune and even reproductive systems wouldn’t work. The human body contains ten times as many bacteria as it does cells of its own. Scientists are only now beginning to understand why. Bacteria may have played a bigger role in the evolution and development of species than previously thought. Thanks to its symbiotic relationship with bacteria, the bobtail squid, which lives off the coast of Hawaii, is able to light up and defend itself against predators. A marine worm off the coast of Elba can feed itself without having a digestive system, and a species of wasp reproduces alone with the help of bacteria. How great is the invisible power of microbes? A fascinating documentary about the tiniest living things.
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