Space Colonization
Source 1: Space race 2018: Better late than never; Mankind's exploration is back on track after a 40-year lull
Source 2: Space Colonization is Impractical
Source 3: Humans Should Colonize Mars in Case of Global Catastrophe
Source 4: Humanity Should Begin Planning for Interstellar Space Travel
Source 5: NASA Overview
Source 6: Travel to Mars Will Not Become Less Expensive
Source 7: Mars City in United Arab Emirates
Source 8: Do you have what it takes to colonize Mars?
