Is there a risk of contaminating Earth with space-resistant bacteria when de-orbiting the ISS? 03:16 Could we colonize Mars if it had air? 07:39 Could we colonize Venus if it had air? 📺 VIDEO VERSIONhttps://youtu.be/b0sdyvaSRK4📰 GUIDE TO SPACE NewsletterNo ads. Subscribe for FREE: https://universetoday.com/newsletter🎧 PODCASTSUniverse Today: https://universetoday.fireside.fm/Astronomy Cast: http://www.astronomycast.com/📩 CONTACT FRASER[email protected]⚖️ LICENSECreative Commons Attribution 4.0 International (CC BY 4.0)