Hawking proposed in 2010 that BH can’t collapse beyond the event horizon, that there isn’t one. https://www.pbs.org/newshour/science/hawking-meant-black-holes

In 2014 Vaz said the boundary is outside the Schwarzschild radius. http://arxiv.org/abs/1407.3823

If they’re right, then there’s no inside to be trapped in.

Newton’s classical observations have stood up well.

If anything, it’s quantum that has been poorly treated by generations of explaining-away. The world of the tiny must be predicted with probabilities because there is no way for us to observe it directly. It’s not rolling dice … we -have- to.

While trying out models of what it’s doing boggles our minds, our limitations mean we cannot decide whether it’s really deterministic. Reality isn’t limited that way. (Einstein was right.)

Some astronomers recently took a clever look for whether space is quantized into a ‘froth’. They studied monochrome light from stars 18 billion light years away, at redshift z=2.34. They found evidence of quantization into froth in all that time. https://arxiv.org/abs/2001.06016

EDIT: That should have read ‘NO evidence of quantization’ in 18 billion years of travel.

Seems like we -may- have had it worked out already. The major problem is: how do we rein in the people who want to do it their way and become kings?

When I was a young teem, a teacher put a slice of apple in a sealed container with a few fruit-flies. A week later, there were hundreds of fruit-flies. In another week the bottom of the container was covered with the bodies of fruit-flies. Quick, unforgettable lesson.

Posts like this show that not everyone understands what science is, though that doesn’t stop them. Sometimes just having one downvote isn’t enough.

Why does the brain need billions of neurons to process 10 bits/s? The stark contrast between these numbers remains unexplained…

Not so much. The stark contrast is the result of a set of stupid premises.

our sensory systems gather data at ∼1⁢0^9 bits/s.

Even In the ‘machine model’ of the brain this article appears to espouse … vastly simplistic as it is … the brain processes 10^9 bits of vision, audio, and kinetic clues which usually results in a limited but highly appropriate response … often in much less than a second … to gymnastic moves or crossing a busy street, driving a jet, performing on a violin, whatever. That response quickly arrives as the result of a model built on long experience of actual reality.

The authors fail to come up with -any- source (credible or not) for that ridiculous 10 bits/s number. Their model is so simplistic it isn’t even worth engaging with.

Good stuff!! I might have missed the thermistor part.

The Romans managed to figure out that lead was bad for you. That didn’t stop it from being used for the next 1500 years. Including in gasoline. And in paint.

https://www.epa.gov/archive/epa/aboutepa/lead-poisoning-historical-perspective.html

Up until recently, a lot of US plumbers used lead pipes in homes to bring drinking water to the faucet. Even if home lead plumbing is replaced, the pipes leading to the water meter may be lead.

https://www.epa.gov/ground-water-and-drinking-water/protect-your-tap-quick-check-lead-0

For Krogh, the source of the number, it was a quite reasonable estimate, which was about all that was possible at the time. And it was ‘wrong’ by less than an order of magnitude … compared to the newest estimate. AND an estimate of a truly unimportant number is as good as you can get (or need) in many cases. What’s the total length of all the ice cores drilled since Camp Century? And their total volume is?

Sabine is a very competent physicist. That’s why her viewpoint - right or wrong - is well worth hearing. The fact that the Nobel went to a computer scientist instead says a lot about the state-of-the-art.

Sabine knows her shit. May she coax some physicists into getting back into experimenting… and away from Big Science funding.

Here’s a picture of it while it’s still in the shop. https://inspenet.com/en/noticias/nasa-tests-solar-sail-in-solar-in-orbit/

Haven’t heard about the NASA design yet, but JAXA’s 2010 IKAROS used "Eighty blocks of LCD panels are embedded in the sail, whose reflectance can be adjusted for attitude contro ".