'I wonder how we ever managed to launch anything in space with that kind of stuff,'

So do I. It really is astonishing when you consider all NASA was able to accomplish in about a decade at a time a digital calculator was the size of a dictionary (or something like that, I'm not actually old enough to be the get-off-my-lawn group). Check out the documentary The NASA Missions: When We Left Earth, it really gives you an appreciation for this.

And, frankly, I can't blame Glenn for "[not trusting] a 20-year-old today" and I don't think it's age-discrimination either. Would you trust some gizmo-reliant "adult teenager" of today to put you in into LEO? NASA was using slide-rules, hard science and critical thinking. Today, some "20-year-old" will probably just take a computed message at its word without a second thought.

(it's not ageist for me to say of any of this, I'm in my 20's :P)

I've already optimized my intake: it's 0.

Honestly, why do people addict themselves to this crap? Stop eating McCrappers all the time, get some exercise and you might be surprised how much energy you have without caffeine. You'll feel a lot better, too, not being buzzed and strung out all the time.

(pronounced taze... like tazer)

Sorry, I can't help myself ... it's actually pronounced "Taves" (long "a").

OK, so this is an obvious malinterpretation of law, but I'm surprised that no one has mentioned the potential medical misdirection here. Hematopoietic stem cells are not like embryonic stem cells that can theoretically be engineered to grow into any type of cell -- they can only create blood cells, not tissue, bone, etc.

This is disturbingly reminiscent of a story I read here about people who died from having HSCs injected into their kidneys by snake-oil doctors.