ESA Explores Using Insects to Feed Future Astronauts

For decades, insects have quietly orbited Earth as the first living beings to venture into space, and now the European Space Agency (ESA) is exploring whether they could also help sustain future astronauts on long-duration missions. The idea stems from the growing interest in closed-loop life support systems for space exploration, where recycling resources like food, water, and oxygen is critical. Insects, particularly species such as black soldier flies and mealworms, are being studied for their ability to convert organic waste into high-protein biomass efficiently and with minimal environmental impact. Researchers note that insect farming requires far less land, water, and feed than traditional livestock, making it a promising candidate for sustainable food production in resource-limited environments like spacecraft or lunar bases. Their rapid reproduction rates and high nutritional value — rich in protein, healthy fats, and essential micronutrients — further support their potential role in space diets. ESA’s current investigations focus on understanding how insect biology and behavior are affected by microgravity and space radiation, as well as developing safe, hygienic methods for cultivating and processing them in space habitats. While no insects have yet been consumed by astronauts on missions, ground-based experiments and simulations are laying the foundation for future trials. Experts emphasize that integrating insects into space food systems isn’t just about nutrition — it also ties into broader goals of sustainability and waste reduction. By using insect farming to process human inedible waste, space missions could reduce reliance on resupply from Earth and move closer to true self-sufficiency. Even though the concept may seem unconventional to some, scientists point out that insect consumption is already common in many cultures worldwide and is gaining attention as a sustainable protein source on Earth. Adapting this practice for space could represent a practical step toward enabling longer human presence beyond low Earth orbit. As space agencies prepare for missions to the Moon and Mars, innovations like insect-based food systems may play a quiet but vital role in ensuring astronauts remain healthy, nourished, and resilient during extended journeys through the cosmos.