crazyhadron

crazyhadron t1_iyvu7rn wrote

Reply to comment by dedasdude in Milky way centre on cheap Nikon D3300 and a cheaper nikon 50mm f1.8 lens. Taken few kms out of city during a powercut, India. by dedasdude

I have the very same model, never thought of using it for astrophotography. What is your equipment like? I'd like to take similar photographs when I visit the Himalayas.

Edit: Saw your comment below mentioning the lens. What stand are you using, and can I find it on amazon?

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crazyhadron t1_ivi647z wrote

Reply to comment by dontshamemebro in Has there been a global drop in men's testosterone levels in recent decades? by St4nM4rsh

Evolution.

Humans may have domesticated a lot of animals, but the one creature we've domesticated the most is ourselves.

Since testosterone is an immune inhibitor, and since diseases rise in frequency with greater population density, it would've made sense for men with lower levels to fare far better than their manlier counterparts. Also makes for better neighbors.

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crazyhadron t1_ive494i wrote

Reply to comment by AlternativeBasket in TIL that most non-human primate infants actively use their hands to help themselves out of the birth canal. Human infants do not, but their grip strength is much higher during the hours immediately after they are born. by afeeney

Nah, the bottleneck (heh) is the amount of energy a baby needs to survive within the womb. Birth happens when the placenta's throughput isn't enough to sustain the baby much longer, and it triggers the delivery process.

Kinda wonky to think that boobs are able to push much more nutrients through them than the placenta itself. Anywhere between 500-700kcals, that's as much as the brain itself uses and it's the most energy-intensive organ in the human body.

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crazyhadron t1_issahe1 wrote

Reply to How is the human gut microbiome established in infancy or earlier on? by molllymaybe

It is mostly devoid of bacteria while in the womb, or the mother would be having a far worse time. A bacterial infection within a fetus that has no immune system, and where the mother's immune system cannot reach, but is still contained inside the mother's body? Talk about a nightmare.

So, the human microbiome is instantiated at the time of birth, while the baby is sliding out of the birth canal and vagina. They aren't exactly sterile, especially when outlets that shouldn't be leaking start leaking.

The next major source of inoculation is via breastfeeding. Breastmilk itself isn't sterile, and neither is the delivery vessel. All that ends up passing right though the stomach and lands within the intestines.

And you pick up other critters while eating, breathing, and generally living. They are everywhere, after all.

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