Sashai'm finally reading what if? by Randall Munroe and I love this book. A lot of these articles have aged really well.
He wrote a whole article about "what if we all quarantined for a few weeks" well before COVID (https://twitter.com/xkcd/status/1300507567974735875?lang=en).
And wrote something about what would happen if you flew an aircraft on Mars a few years before we actually did that! (though he only ran the calculations for fixed wing aircraft).
I also saw this photo, which I never knew existed, from 5km above the surface of Titan (Uranus' moon):
