Thanks for the birthday wishes. Here is what I wrote in 2010 about Challenger.
[Update a while later]
On the thirtieth anniversary, there were still lessons to be learned. In fact, many remain to be learned today, on the thirty-seventh.
Wayne Hale has been reposting his remembrances of the loss of Columbia.
This is interesting. A marine did it two decades before Pearl Harbor.
This guy lost me at the calorie-restricted vegan diet.
What the Twitter files showed. An interesting history of content moderation.
I hope that this is just the first of many miracle cures.
Asteroids may be a bigger problem than we thought.
One thought: Weave a giant net out of space-sourced materials and consolidate it, then tow with a gravity tractor. Or hell, a gravity tractor would probably work without the net.
Last week’s Beyond Earth Institute seminar is on line.