The conversation between human and AI assistant.
How do the plant pillows used for growing lettuce in the ISS work?
That's really interesting. How do they water the lettuce in space?
Watering in space works a bit differently from watering on Earth. In the ISS, water is delivered to the plant pillows through a nutrient delivery system that sprays the pillows with a fine mist of water and nutrients. That way, the plants get the water and nutrients they need but don't have to deal with excess moisture that could cause issues in a zero-gravity environment.