Is There Life On Mars? Using light to find life on other planets

What factors came together to create an environment that sustains life on our planet? By understanding where we came from, we have a base of understanding to know what to look for when searching for similar life elsewhere in our universe. Dr. Bernie Bopp and Dr. Karen Bjorkman join Plugged-In reporter Katie Colosimo, and explain how we can use the light spectrum to analyze environments light years away.