# Deep-Sea Life Without Sunlight

Contrast photosynthesis (energy from sunlight) with chemosynthesis (energy from oxidising chemicals like hydrogen sulphide); describe hydrothermal vent communities: chemoautotrophic bacteria form the base of a food web supporting tube worms, giant clams, and vent crabs with no sunlight; explore what deep-sea life tells us about the origin of life on Earth; explain why NASA studies ocean vents as analogues for potential life around hydrothermal activity on Europa and Enceladus

Builds on: Deep-Sea Creatures (hard, https://ai.page/c/deep-sea-creatures/en.md)

Concept id: deep-sea-life-without-sunlight. Subject: science. Licence: CC BY-SA 4.0.

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