Recent comments in /f/todayilearned

garrethgobulcoque t1_jdqom0f wrote

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fredsam25 t1_jdqn5cq wrote

There is no single cause. In aggregate, more males than females are born. Some of it is from the dna distribution in viable sperm, some of it is viability in the womb, some of it is generations of selecting for male babies (post birth abortions of females) making a those that naturally abort female fetuses because of genetic flaws more likely to pass on their genetics, and some of it is still not known.

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Dubanx t1_jdqmigl wrote

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Dubanx t1_jdqm4ox wrote

>The actual danger of removing his helmet in the situation above is that it wouldn't solve the problem

Without pressure, wouldn't the water immediately boil away? There literally wouldn't be anything holding the bonds together anymore.

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somekennyguy t1_jdqm0i4 wrote

So, old story my dad told me. Not 100% on the accuracy, but basically if you want a male, wait and let the male spermies accumulate before attempting. While there are less of them, they typically swim faster and waiting for a bit gives a chance for them to accumulate to sway the odds. If you want a female, just keep going at it. Body produces more female sperm so chances are higher for this outcome. Evolution wise I guess it would make sense as you need more hosts than seed slingers...

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PN_Guin t1_jdqkm5n wrote

It probably ended quite as "well" as I think it did. With plenty of overtime for police, ambulances, hospitals, firefighters, judges and companies installing new window panels.

Just not as well as the organisers thought it would.

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Hedgerow_Snuffler t1_jdqkl2v wrote

WHAT? I swear sometimes I read stuff on here and think, have I slipped into some parallel reality?

There's an entire sub category of Roman Villas, called Corridor Villas. We have them here in Britain, and they can be found across most of Western Europe.

Chedworth Roman Villa (late 3rd early 4th C) has TWO nearly 50m long corridors, The majority of that Wiki article is utter bobbins and bum guff,

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hpisbi t1_jdqk78v wrote

there are some other theories, including that Y chromosome sperm swim slightly faster than X chromosome sperm or that female embryos have a slightly higher chance of miscarrying. so they’re saying that the current view is that the ratio of X and Y sperm produced is what makes the difference, not the other theories.

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IkmoIkmo t1_jdqjy0s wrote

I wonder how long that's been the case, and if via evolutionary theory it gave rise to physical and indeed cultural gender norms, around strength and competition and such.

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After all, while it's a bit of a stretch, just to hypothesize: in a world with 8 billion people, having a 51/49 ratio means there's 3.90 billion women to 4.1 billion men.

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In other words, there's 200 million men who by definition will not be in a relationship, assuming 100% of possible people engage in an exclusive relationship. That's 200 million men constantly competing to become one of the group of 3.9 billion men. Depending on status, men are able to join the group, or fall out of it. But the default state is to compete, as there's no partner for the bottom rung, which is statistically not true for women. It creates a bias to compete, also in evolutionary terms, which may have caused men to evolve to become physically stronger (an important trait for competition in the last 300 thousand years), and to become biologically or perhaps just culturally geared towards competition.

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I understand this is a super black & white view of the world that enormously simplifies a much more complex world. But I do wonder if this birth ratio difference is one of the drivers of the physical, biological and cultural differences we see (on average) across genders. Would be cool to see a sci-fi show which explores different birth ratios (e.g. 60/40 or 40/60), and what effect that would have on via evolution on biology, and on culture.

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Captain-Griffen t1_jdqjtge wrote

As you might expect, fault in both cases was primarily assigned to the destroyers rather than the carrier. What fault that lay with the carrier was mostly in not screaming "wtf are you doing?" early enough at the destroyers.

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