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more about the moon's surface than we do the deepest parts of the ocean. And sunlight, that doesn't reach deep into the ocean, so life on or near the sea floor, they can't use photosynthesis. So that's a plant and algae and some bacteria that infers sunlight into energy. And researchers have long thought that these branches where these life forms are found to host communities powered by other chemical reactions rely on hydrogen, sulfide, and methane. That's coming up from the sea floor. But chemo-synthesis-based communities, they're rarely documented. And most of the deep ocean remains unexplored. In fact, a study published in May found that humans have explored 0.001% of the deep ocean floor. And that's just below 656 feet or 200 meters.