What is the main difference between life on earth and life in space?

The main difference between life on Earth and life in space lies in the environmental conditions. Earth provides a stable atmosphere, gravity, and a variety of ecosystems that support diverse life forms. In contrast, space is a vacuum with extreme temperatures, radiation, and microgravity, which poses significant challenges for sustaining life. As a result, life as we know it cannot survive in space without specialized technology or habitats.