Special Note
Ask an Astrobiologist has received more than 2500 questions about Nibiru and 2012, with more than 200 answers posted. Please read a summary of the answers that have already been posted, view a video on these topics, use the search feature and read the FAQ’s before submitting questions on these topics.
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Question
How would you determine if life might be present on an extrasolar planet?
This is a frequently asked question, and there is no simple answer -- it will not be easy to determine if an extrasolar planet has life or does not. Use the search engine to locate other answers posted to similar questions (try searching under habitability, biomarkers, and biosignatures).
David Morrison
NAI Senior Scientist
February 7, 2005
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