The document discusses evidence that life may have existed on Mars in the past or on other planets currently. It notes that ice caps found on Mars were likely water in the past, and a fossil from Mars was discovered in Antarctica, providing evidence of past Martian life. A newly discovered planet, GJ 1214b, is similar to Earth and could support liquid water based on its density and pressure, meaning life may exist there currently. While evidence for life elsewhere is limited now, the universe is immense so life likely exists on other planets.