I'm still waiting to hear how Hillary being "extremely careless" does not rise to the level of "gross negligence" that should trigger prosecution. I'm assuming that I'll be waiting until the heat death of the universe for a reasonable explanation of that.
If you want to make them consider the consequences, take them to an alley to talk to a homeless teenage single mother crackhead about her regrets.
Studies show that "scared straight" programs not only don't work, they can actually have a negative impact on the kids exposed to them.
The significance of this is Elon Musk, who is the self-driving Uber of dot.com billionaires and is the hero of our times.
Well, I knew Steve Jobs well enough, and have met a few civilian astronauts and a bunch of other rich people. None of the others seem to have done so much for the long-term future of the human race as Musk has in leading the path to more affordable spaceflight.
Well, it beats making them into the world's most complicated airplanes as with the space shuttle. SpaceX has proven that they can do vertical landings of the first stage intact onto both land and a seagoing barge; after a trip out of the atmosphere and to about 1/5 of orbital velocity but not into orbit. They plan to do a parachute-less vertical landing of the Dragon capsule after a heat-shield re-entry. That turns out to be far less expensive and complicated than a space plane. It does turn out we need a lifting body for much larger vehicles. It still doesn't have to be a plane, though.
We don't need wings.
No idea. I am not into men in latex costumes.
3-4 percent of the heat of the sun is a massive difference.
The cretacious may be the odd one out - but then nothing alive today was alive then and it's unlikely any of the species on the planet today (which includes us) could have survived in those conditions.
The key elements in human thinking are not numbers but labels of fuzzy sets. -- L. Zadeh