Some of the conclusions are actually quite sweet, like this one.
140 characters may not be a lot, but we will never run out of things to say.
And this one, for inspirational science value:
I've never seen the Icarus story as a lesson about the limitations of humans. I see it as a lesson about the limitations of wax as an adhesive.
Billion-Story Building is written to try and explain to a 4.5 year old the problems of the titular building. And despite the fact that the author is describing how a billion-story building is impossible, he ends by saying that it's very similar to the concept of a space elevator, and basically shows her that science could make her dream a reality:
We can't build one yet because there are some problems we don't know how to solve, like how to make the tower strong enough and send power up it to run the elevators. If you really want to build a gigantic tower, you can find out about some of the problems they're working on, and eventually become one of the people coming up with ideas to solve them. Maybe, someday, you could build a giant tower to space.