Life detection methods are techniques used to identify signs of life, particularly in environments beyond Earth. These methods include analyzing chemical signatures, such as biosignatures, which are molecules produced by living organisms. Instruments like mass spectrometers and gas chromatographs can detect these signatures in soil, air, or water samples. Another approach involves remote sensing, which uses satellites or spacecraft to observe planetary surfaces for features indicative of life, such as water bodies or vegetation. Additionally, robotic landers and rovers can perform in-situ analysis, directly examining the soil and atmosphere for biological activity or organic compounds.