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kadu , in At what systemic level do we start to see living beings making decisions rather than purely chemical reactions?
@kadu@lemmy.world avatar

Abandon the philosopical concept of an independent thinking mind capable of evaluating something by itself.

“Decisions” and “Thoughts” don’t exist without the environment, as they’re a succession of neuronal activation cascades in response to the current state of all stimulus, the previous connections formed in your brain, and reinforced patterns.

Leave a human being in an empty void and their thoughts will be built by severely boosting sensitivity and then responding to random sensory noise. Sever all sensory connections and the mind shuts down.

ritswd , in At what systemic level do we start to see living beings making decisions rather than purely chemical reactions?

If I remember my cognitive science classes, all decisions even complex are powered by a person’s neural circuits, in which neurons talk to each other chemically using neurotransmitters. Basically, large groups of constantly-rearranging neurons are what turn what you call “chemical laws” into constantly-evolving decisions.

Contramuffin , in At what systemic level do we start to see living beings making decisions rather than purely chemical reactions?

Frankly, the decisions that we make are chemical reactions. The difference is in the complexity of the decisions that we can make. At that point, though, in order to answer your question, we would need to argue about what one would consider to be a decision that’s complex enough and a decision that’s not complex enough, and that leans much more into philosophy and ethics rather than science.

I can only tell you that, from a mechanistic point of view, there’s not really much distinguishing our decision making process from, say, the decision making of a flatworm

WFH , in How is the moon tidally locked?
@WFH@lemmy.world avatar

All the large moons in the solar system are tidally locked to their planet!

Pluto and Charon are tidally locked to each other!

The earth would eventually be tidally locked to the moon too, but because it’s happening so slowly, it wouldn’t happen before the sun turns into a red giant and engulf both!

Woozy ,

There is such a huge difference in the masses of the earth and moon that although the moon is slowing the rotation of the earth, the earth’s rotation is also speeding up the moon’s orbit. The faster orbit is causing the moon to move farther away from the earth.

BlackJerseyGiant , in What exactly is a magnetic field?

So, the purveyor of the electromagnetic force is the photon, as in visible light and radiation. If you look into it you find talk of “virtual photons” being the purveyors of magnetic force, but it seems they are more of a mathematical construct, and if you read enough about it, it becomes clear that it’s a whole lot of technical language that boils down to, “we dunno”.

Drunemeton , in Let's do a reverse post. Have any physiology related questions?
@Drunemeton@lemmy.world avatar

I’ve read that the ability to process lactose is the most recent evolutionary step for humanity. Is that correct?

Apytele , (edited )

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j4k3 , in How is the moon tidally locked?
@j4k3@lemmy.world avatar

To really blow your mind, the Moon is slowly moving away, but will never escape. Eventually both the Earth and the Moon will become tidally locked to each other at which point the Moon will no longer move further away. This assumes no outside influences and enough time.

nottheengineer , in How is the moon tidally locked?
Hypersapien OP ,

So why doesn’t the moon rotate around the axis that’s on the line that points from the Earth to the moon? The “Z” axis as we look into the sky?

Or does it?

nottheengineer ,

Try recreating that spin with a fidget spinner and slowly turn it around like the moon turns to face earth. You’ll find that it wants to turn in a way where it spins around the same axis it’s orbiting.

Since the moon has no hand preventing it from doing that, it aligns its spin with the orbit, so the forces described in the article bring that rotation to a halt.

jasparagus , in How is the moon tidally locked?
@jasparagus@lemmy.world avatar

Here’s a good explainer:

What is tidal locking? phys.org/news/2015-11-tidal.html

Basically, the moon acted like a spinning (unbalanced) wheel, and eventually stopped with the “heavy” side pointing “down” towards Earth. I.e. think of the moon as orbiting Earth with the heavy side staying pointed at Earth.

Poiar , in what is your favourite fact?

I don’t know if this counts, considering the community’s name, but here goes:

In the Philippines, there exists:

  • an island
  • in a lake
  • on an island
  • in a lake
  • on an island

and I, for some reason, think this is amazingly interesting :)

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