Exploring Venus S01 E03 Is There Life in the Clouds of Venus?

For more than 100 years astronomers have seen dark patches swirling in the clouds of Venus, visible only in ultraviolet light. Could there be life-forms thriving in the balmy zone 50km above the hellish surface? On Earth, researchers find life everywhere they look, including acid-loving bacteria that could easily live in Venus' air. How will the experts investigate this fascinating possibility?