INTERVIEW: Is there life on Mars? New research seems to show there was, once.

This week, NASA announced findings of potential biosignatures on Mars. Does that mean there's proof that there was once life on Mars? In this edition of Weekend One on One, Dr Micheal Tice, geology professor at Texas A&M University, who's involved in the ongoing research project, explains what the findings mean.

Dr. Micheal Tice, geology professor at Texas A&M University Source: Getty, AP

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