Comments by "Kevin Street" (@Kevin_Street) on "Life on Mars Might Have Caused Its Own Extinction. COVID Made In Boston. And more." video.

  1. Thank you for this video! Technically I'm procrastinating on YouTube, but thanks to you I'm thinking about interesting science news while doing it. That's high value procrastination. ;) The Hubble tension thing is really intriguing! Guess I need to check out your earlier video to see what the consequences of matter not being evenly distributed might be. The Spohn and Höning study seems a bit... suspect to me. (And yes, I'm an ignorant non-scientist person who hasn't read their paper, so my opinion isn't worth much.) They used a computer model that predicts the distribution of water and land on Earth-like planets, but we don't even know for sure how Earth got its water. If our water came from comets and asteroids, wouldn't that be a wildly variable factor in other star systems? Depending on where the Earth-like planet formed in its accretion disk it might have radically more or less water than we do - then there's the bombardment factor to consider, which would depend upon the distribution of other objects in that star system. I don't think we can confidently make predictions like "most Earth-like planets will have tiny oceans."
    5