Recent comments in /f/askscience

aldinski t1_jcv4zn2 wrote

The Botai culture was believed to be pasturing horses but initially without proof of horse riding, therefore the idea that before riding was developed, the horses were bred for meat. As far as I understood this is kind of debunked now, as there were finds of horse skulls from that time with marks on their teeth originating from snaffle bits. To me the idea of herding an animal good in running like horses as a walking human seems ridiculous.

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TwentySevenNihilists t1_jcuwddr wrote

This is a well-known phenomenon among people with autism and ADHD, a population that significantly overlaps with the Ehlers-Danlos and fibromyalgia crowd mentioned in the post by u/Onikenbai, but it affects all humans to varying degrees of severity.

The best way I've heard it explained, that jives with my own lived experience as well, is that our brains are highly sophisticated filters that tune out the majority of our sensory input.

Think about focusing on a single sound in a noisy room, or identifying one flavor in a complex dish. Now imagine the opposite where you're simultaneously focusing on EVERY sound in a noisy room, AND the food you're tasting, while feeling every square inch of cloth that's touching your skin, the weight of your body on your joints and muscles, every scent in the room, the air currents pushing on every exposed hair....

You would be in a full-bore sensory meltdown and someone would probably find you rocking back and forth in the fetal position on the floor.

That's what our brains try to prevent every second of our lives, and it is a very taxing, resource intensive process. When we're tired, our brains are trying to do the same job with fewer resources, so the filter isn't as effective. Sleep deprivation, low blood sugar, dehydration, and simple end-of-the-day fatigue all stress your brain's ability to filter out unnecessary information. The result is that everything is a little louder, a little brighter, a little more intrusive than it would have been earlier in the day.

A fun example of this that could happen to anyone are the shingles scars on my left shoulder and chest. They itch constantly due to damage in the spinal nerve branch that feeds that part of my body. There's nothing wrong with the skin, but it always itches because of the damage to the nerves.

I can't feel it right now because my brain has gotten used to it and filters out the sensation, like how you can't smell your own house unless you leave it for a while. If I miss a night of sleep though, those scars itch incessantly and there's nothing I can do about it except getting some sleep to recharge my brain.

The only other thing I can think of is if there's more background noise from outside the theatre earlier in the day that raises the noise floor and makes the sound system sound quieter. I imagine you probably have pretty effective sound insulation in a professional theatre though.

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Dr_Rapier t1_jcuqvp7 wrote

Vogelkopf Bower Birds decorate the area around their nest/loveshack to prove their suitability as mates. The b interesting thing is that they share a human aesthetic. That is to say the nests that a test group of humans said were the most attractive were also the most 'successful'. Showing that the female bowerbirds agreed with the humans on what constituted a pretty nest.

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-Metacelsus- t1_jcubm4g wrote

>if any epigenetic chromosomal markings are more associated with one sex or anything like that.

Yes! This is called epigenetic imprinting. Some genes are differentially methylated between the mother's and father's copy. I wrote about this here: https://denovo.substack.com/p/epigenetics-of-the-mammalian-germline

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BeanC0unt3r t1_jctz0ss wrote

The horses that were first domesticated by humans around 5,500 years ago were smaller and had a different body shape compared to modern horses. They were also less suited to carrying heavy loads or being ridden. Over time, humans selectively bred horses for certain traits, resulting in larger, stronger, and more docile horses that are better suited for work, racing, and riding.

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OneAndOnlyJoeseki t1_jctx3lh wrote

Your description of opposite has to be wrong then

MW — And— GA. Milky way is moving toward Ga Faster than And

MW - GA — And Something is very wrong with this scenario

And - MW - GA. And is moving faster than MwW

And - GA - MW. Again something very wrong with-physics in tuis scenario

Which is it?

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