One hundred years ago, some astronomers thought they could see canals built on Mars. A space probe in the 1960s dashed this hope. Alien Life Search takes a fascinating scientific look at our early ideas of extraterrestrials and what we know today including: - the different galaxies of the universe - which planets may have the right conditions to support life - a scientific discussion of aliens, UFOs, and how their spacecraft might work - a realistic look at claims of extraterrestrial sightings - a helpful glossary to explain scientific terms and concepts