1) Studying alien life forms can help us better understand how life survived in harsher climates than ours, this understanding is necessary for manned space missions.
2) The resources on earth are limited and being used exponentially faster than they can be replenished. Look up Indium, we are almost out of it and it is used in pretty much anything with a screen on it. Same goes for many other rare elements.
---------- Post added 2012-11-27 at 10:47 PM ----------