Is there life on Mars? Curiosity didn't find any, but that's hardly a conclusive answer. In fact, a handful of NASA scientists claim that the US space agency is looking for life in all the wrong places. The Mars rover explored the red planet's dry, irradiated surface: If the planet still hosts life, it's probably several meters underground. Now a team of scientists -- including a few NASA veterans -- is hoping to fund a mission to search for life under Mars' surface. The project is called ExoLance, and its Indiegogo campaign hopes to pitch a series of high-tech darts at the red planet's crust.