Humans will one day be on Mars. There are already plans (even if somewhat dubious) of sending 24 humans on a one-way trip to Mars. In any case, it is not hard to imagine that we will have the ability to establish a permanent humans presence on Mars in the next fifty to a hundred years. But what if there is microbial life on Mars? In this episode of Science ka Adda (SkA), Salman Hameed looks at United Nations Outer Space Treaty and explores the questions: If we discover microbial life on Mars, will we then have a right to be on “their” planet and alter their future?