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Comment Re:You know what... (Score 2) 120

What vaccinations do you think make people healthy?

You may have a semantic point: preventing you from contracting or suffering from some disease is not exactly the same thing as making you healthy. I would argue that's a distinction without a difference: from one's lived experience, avoiding disease amounts to the same thing as staying healthy. Unfortunately, as with a lot of beneficial things that happen in the background, it becomes easy to take it for granted. You'll certainly miss it when it's gone, though.

Comment Re:I wish they would stop calling it (Score 1) 52

Fossil fuels. It's not "old dinosaurs. Petroleum, natural gas and coal come from biomass, primarily from plankton and decaying marine organisms, and “single-celled bacteria”

You do realize that a lot of the plankton and marine organisms that became fossil fuels are actually older than most dinosaurs?

Comment Re:271 meters (Score 4, Informative) 44

except for the Shuttle, no one has performed a controlled (or powered) landing

I'm not sure how you define "controlled" and "powered" in this context. Once in the atmosphere, the Shuttle was a glider (and a rather poor one at that!) - there was no thrust being applied by its engines. It was an unpowered landing. If you didn't have your landing lined up just right, you could not abort, circle around, and try again like for an airplane.

As for controlled: capsules like Dragon (and Soyuz, and Apollo, etc.) are designed to be passively stable - they'll naturally orient blunt-end-first. But they usually aren't re-entered in that passive configuration. If you do, you end up on a "ballistic" trajectory that comes down relatively steeply: hot, high-G loads. You'll probably survive, but you won't enjoy the ride, the capsule may never fly again, and you'll be 10-100s of km from your intended landing location. Instead, capsules (and the Shuttle) use active control with their thrusters, and weight distribution, to modify their angle of attack, riding high in the thin upper atmosphere as long as they can, bleeding off velocity, and end up with a gentler re-entry profile as a result. They also use this control to bring their landing point as close to target as they can.

Comment Re:Such efforts usually or always fail (Score 1) 70

There is almost no infrastructure required for this; It's a single building about the size of a small service center or car wash. In there is all the charging infrastructure you need, too.

A small service center with a 1-MW electrical connection. (A 1000-kVA transformer is roughly the size of an SUV and weighs 5-10 tons.) Custom charging electronics and robotic handling systems in the $10^7 range. A stack of semi-custom truck-capacity batteries that run $10^5 apiece.

But, yeah, aside from that, no infrastructure needed.

That said: there are use cases for this technology, which the article does highlight. Specifically fleet vehicles, where time on the road (even 24/7 operation) is well worth the expense of battery swap equipment.

Comment Only until (Score 4, Insightful) 21

Sounds like it's time for John Deere to purchase some $TRUMP coin. A press conference praising his bold leadership probably wouldn't hurt, either.

(Some may think I'm trolling, but looking at some of the cases the Feds have dropped in the last few months, and pardons granted, this seems like a sound strategy.)

Comment Re:Hmm. and what about everything else ? (Score 1) 276

And on the topic of email, Gmail and ms mail have email locked down so hard that it's difficult for any sane person to do email now. ms and google control email to a large extent.

Please explain what you mean by this. Anyone can set up an email server - there's not much special that Google or MS bring to that - and email clients exist in spades.

Comment Re:Volume (Score 2) 80

Does Central Park (assuming NYC) have a "volume"? I looked it up and it's not 1km wide, but it's longer than 1km long, so how does this 2D rectangle to 3D sphere comparison work?

This video from XKCD provides some context.

Assuming you could (1) puree all of humanity into one giant sphere, and (2) manifest that into existence right in the middle of Central Park...it wouldn't remain there for long.

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