What an incredible year it’s been for Scott Kelly and Mikhail Kornienko orbiting 5440 times around the Earth and 340 days later they have traveled a distance equal to that too Mars. This is the test needed to know what humanity will experience getting to the red planet and the science from this has only started. As a control sample there’s Scott's twin brother Mark Kelly, who offers the best (though even as an identical twin not perfect) comparison to try to observe changes in Scott’s genetic profile due to space.
Also a big shout out to NASA's awesome Hubble Space Telescope finding the most distant galaxy. Madness that it’s forming so vigorously when the universe was just a few hundred million years old.