Can A Scientist Define â€œLifeâ€?
Defining life poses a challenge thatâ€™s downright philosophical. Thereâ€™s no ambiguity in looking for water, because we have a clear definition of it. That definition is the same whether youâ€™re on Earth, on Mars, or in intergalactic space. It is the same whether youâ€™re dealing with water as ice, liquid, or vapor. But there is no definition of life thatâ€™s universally agreed upon.