Instead of science, we are left with a mélange of science, engineering, values, assumptions, and ideology.
A mix of chloroform and acetone might seem like an odd place to hunt for clues, but researchers have used just such a combination to create conditions where for some purposes time actually appears to move backwards.
For the past 160 years, it's been weakening at an alarming rate. Scientists are concerned that one day, our magnetic poles could flip like they did 780-thousand years ago.
If it happened some 780 thousand years ago, then it is not all that unusual.
Tarduno thinks this recurrent phenomena is caused by a disturbance in the Earth's outer core layer where the magnetic field is generated.
It's not unusual, but every few hundred thousand years is probably more troublesome (for us, right now) than the every few million years it used to be.
Earth's rotation doesn't speed up. Lunatic tidal forces slows it down. The magnetic field a different story.
Earth's rotation doesn't speed up. Lunatic tidal forces slows it down.
Quote from: jax on 2018-03-28, 05:54:06Earth's rotation doesn't speed up. Lunatic tidal forces slows it down.I've heard it said that some earthquakes might speed up the earth as much as 3 µs per day.Possible reference here: https://www.livescience.com/38083-earth-core-day-length-pattern.htmlWhat I meant above is that I wouldn't know if there's been any recent adjustment to the common knowledge that the long-term trend is down. I phrased that badly.
We argue that experimental neuroscientists routinely observe and manipulate neural representations in their laboratory. If a type of entity is observable and manipulable, then it exists. Therefore, neural representations are as real as neurons, action potentials, or any other experimentally established entities in our ontology.
ersi wants to read
Compared to its copies, the tiny cylinder [of etalon kilogram] appeared to be getting progressively lighter. That, or its copies were getting progressively heavier. It's impossible say which, since Big K, by definition, is exactly one kilogram.
And I always thought the real definition of kg was, as the article said, the mass of a litre of distilled water at its freezing point, and the etalon was just some secondary thing. Turns out the etalon was primary for some reason.
Quote from: ersi on 2018-11-17, 15:51:55And I always thought the real definition of kg was, as the article said, the mass of a litre of distilled water at its freezing point, and the etalon was just some secondary thing. Turns out the etalon was primary for some reason.At about 4 °C. That definition was not very practical or precise, and error-prone. The Paris metal door-stop was klugey, but more usable.
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