Let's imagine how scientists might search for life on a distant exoplanet (a planet outside our solar system).

Step 1: Identify a promising exoplanet. Scientists use powerful telescopes, like the James Webb Space Telescope, to find planets that are in the 'habitable zone' – not too hot, not too cold, just right for liquid water.
---Step 2: Study the exoplanet's atmosphere. They analyze the light passing through the planet's atmosphere to see what gases are present. For example, if they detect a lot of oxygen or methane, it could be a sign of life, as these gases are often produced by living organisms on Earth.
---Step 3: Look for biosignatures. These are specific chemicals or features that indicate the presence of life. Besides gases, they might look for certain pigments or unusual energy signatures.
---Step 4: Use powerful radio telescopes to listen for signals. While this is less likely to find microbial life, it's how we'd try to detect intelligent alien civilizations, like listening for a radio station from another city.
---Step 5: Send probes or rovers (if the planet is in our solar system). For places like Mars, we send robotic explorers to collect samples and directly search for microscopic life or past evidence of it.
---Step 6: Analyze data and repeat. All collected data is carefully studied, and new observations are planned based on findings.

Answer: The process involves identifying habitable environments, analyzing atmospheric compositions for biosignatures, listening for intelligent signals, and sending probes for direct investigation.