the two ones that keep coming up are global (global - theres your space relation right there) warming and anthropology relating to early humans.

and the relation to these to space is that they are intrumental to the two big questions:

1. how does inteligent life develope? we are the only ones we know of yet, so in studying ourselves we can better speculate on other forms of life.

2. How 'habitable' will 'habitable planets' stay? and how long? (the longer the more time for inteligent life, the more stable the better chance as well? or vice versa?) we must first learn about ourselves to get an idea of whats out there. Also: isn't Venus the result of a runaway greenhouse effect? And is mars the exact opposite? Which way is our planet going?

-Justin Kelly