Imagine if you were asked to explore a place so extreme that no human had ever been there. Or, what if you were told to go and search for life in space. What would you say? The simple answer would probably be "That's impossible." But, not to everyone. Explorers ready to push the limits and take on the impossible have helped us better understand the world we live in and the extreme lifeforms that live here. Now that knowledge is applied to new extreme worlds in our search for life elsewhere in