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Comment Mars is still the goal (Score 1) 73

The Moon is target practice. We need to get away from innovative bespoke engineering, into industrial mass production with continuous improvement. To do that we need to fly often. Mars just doesn't have the launch window availability. The biggest part of the challenge is that we were born in the bottom of a deep well. To toss enough stuff out of the well for a long journey is critical. Boosters that reliably fly on time often and cheaply enough to get ships and fuel out of the well. Ships that carry fuel into orbit and return over and over since the vast majority of the material we need to send out of the well isn't payloads or ships, it's fuel. Kilotons of fuel. Once the factories and processes are set up for that going far beyond the Moon is fairly easy. But with a narrow opportunity every two years that's not going to happen in a human lifespan. It's not enough refinement cycles per year.

I see this accelerating the Mars objective, not deferring it.

Comment Re:Why? Please, why? There are so many excellent . (Score 1) 136

What "excellent film adaptation" are you talking about? There's one old animated adaptation, and that's is. There's also a movie that bears the same title, but it's apparently a coincidence: nothing except the title and names of some of main characters matches, thus I don't see how it could be relevant to Tolkien's books.

The first thing about adapting a book is reading it at least once, and Peter Jackson skipped that step.

Comment Re:could someone do that to trap an car on railroa (Score 3, Interesting) 139

That's a blockade done against human drivers, who (usually) know how to drive off the railway track, and the blockaders are only protesting rather than actively trying to murder. They stop cars from passing but don't trap them on the tracks.

What GP suggests is that by people simply standing there, the self-driving car's software will stop on the track without aggressively trying to escape.

Here in Poland we have campaign teaching people how to get out of a railway crossing if you get stuck. A bunch of differently-smart humans didn't even contemplate driving through the bar gate, and in some cases didn't even evacuate the car either. The bars are designated to break easily when forced by a car, but somehow in a stressful situation drivers regard them as sacrosanct. As Waymo cars behave that way in about every potentially dangerous situation, I'm afraid they'll do the same when on a railroad crossing as well.

Submission + - Ryugu asteroid samples contain all DNA and RNA building blocks

symbolset writes: More and more science is pushing back the Drake equation, reducing the parameters necessary for life to form. From the discovery that organic molecules are formed in the little red dot protogalaxies at the edge of our visible universe to AI models that identify a self replicating RNA molecule in only 45 nucleotides. Now comes Toshiki Koga et al with a study published in the journal Nature Astronomy reported on by phys.org finding all the nucleobases of RNA and DNA in pristine samples collected from the asteroid Ryugu. The bases being uracil adenine, guanine, cytosine and thymine. Ammonia was also found.

The universe it seems is made of soup.

Submission + - Thorny issue plaguing lithium-ion batteries laid bare in new study (phys.org)

alternative_right writes: Lithium dendrites, i.e. tiny crystalline thorns that grow off of lithium-ion battery anodes during charging, have been a persistent challenge for the world's most widely used form of energy storage. "Dendrites can penetrate the battery's separator, causing catastrophic short circuits and safety hazards," said Qing Ai, a former research scientist at Rice University who is a first author on a new study published in Science that reports for the first time exactly how these tricky structures behave inside batteries. "Despite decades of study, the fundamental nanomechanical properties of lithium dendrites remained a mystery—until now."

Comment Re:Helium can be re-used? (Score 4, Interesting) 125

Is joke of course. Was angling for the same joke.

3He is normal helium atom with an extra neutron, hoped to be used in some forms of fusion. It's not considered radioactive. Emitted by the sun it's trapped in lunar rock possibly at concentrations of up to 50 parts per billion but more likely 5-10ppb. The utility of extracting it from the Moon is hotly debated. On Earth isolating it from normal helium involves the same sort of centrifuge used to isolate isotopes of uranium, radium, hydrogen but there is far less of it than in lunar soil.

This is not actually the case in the subject at hand. It's all normal helium. When cooled enough all other gases will precipitate out as they freeze - including Hydrogen - leaving only helium as a gas and so easily isolated. That's actually why it's valuable since it's the only gas that will boil off at temperatures so low that the conductors immersed in the fluid will superconduct supporting the currents necessary for the intense electromagnets used in imaging and such. /Explaining nerd jokes since 1983

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