Mars astronauts could live in houses 3D-printed from freeze-dried yeast

In order to survive, the first humans to reach Mars will immediately need a safe and reliable place to set up shop. But building on Earth’s neighbor is immensely more challenging than construction projects at home. The Martian surface is a practically airless vacuum, constantly bombarded with radiation, and regularly reaches temperatures as low as -81 degrees Fahrenheit.However, there is a very specific process on Earth that approximates similar conditions to the Red Planet: freeze-drying.