If we discovered extraterrestrial life, how do you think it would change the world? - People might feel excited or scared., Do you think SETI will ever receive a signal from aliens? Why or why not? - Yes, because the universe is so big that aliens must be out there., The Drake Equation suggests that alien life could be common. Do you think there are many alien civilizations, or are we alone? - There could be many alien civilizations, but they might be far away., If the universe is so big, why haven’t we seen proof of aliens yet? What are some possible explanations? - Maybe aliens are too far away to reach us., Scientists have found thousands of exoplanets. What features do you think a planet needs to support life? - It should have water, like Earth., Why is the Goldilocks Zone so important when looking for alien life? Could life exist outside of it? - It’s important because it allows liquid water to exist., What are some signs (biosignatures) that scientists look for when searching for life on other planets? - Oxygen or methane in a planet’s atmosphere., Extremophiles live in extreme places on Earth. How does this help scientists think about alien life? - It shows that life can survive in places once thought impossible., Astrobiologists study life in space. If you were an astrobiologist, where would you want to search for life first? - Mars, because it once had water.,

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