simple astronomy questions

1) Do you think it is feasible that life traveled here from a different location? Justify your position in three or four sentences.

2) What is the K/T boundary? Why does it suggest that there was a major impact roughly 65 million years ago? How does this relate to fossil records for dinosaurs?

3) Can we create life in the form of artificial intelligence? Notice that it doesn’t have to necessarily be highly intelligent, but it does have to qualify as life. Why or why not?

4) Do you think we should consider building a rover for Europa? Answer this both from a financial as well as a scientific point of view. Justify your position with two or three sentences for each criterion.