We’ve been looking for life on Mars for centuries. Humans have parsed every geological feature that we can find for traces of living neighbors, or at the very least, evidence that some type of creature lived on the red planet in the past. So far, no luck.
In the absence of evidence of life, a not-so-new idea is gaining ground: If we can’t find life on Mars, maybe we could bring life to Mars. Not only that, but we might be able to change the nature of the red planet itself, and turn a dry and lifeless world into a mirror of our own blue and green marble.
It sounds like science fiction, but researchers in the public and private sector are already looking at how current technology can terraform Mars, in part because it would make permanent human settlements much more plausible.