What did you learn today?

ShineCero

ShineCero

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Everyone says that learning something new every day helps to keep your mind sharp. Whether it be true or not, one can only find something new to learn new every day. So this is a thread to post the new things that you have learned recently, so that the knowledge can be passed on and help everyone learn something new today!
 
Echinoderms (i.e. Starfish) do in fact have skeletons; but are endoskeletons. That's really weird bc I've only ever seem em dried up and they don't look like they have anything.

That and I learned how to find intersections of systems of equations with 2 or 3 variables. I remember hating these in 10th grade. Because 3 by 3s took eons to solve.
 
I've learned about the Herero Genocide that occurred in Africa brought forth by the Germans onto the Herero and Nama people. Jesus, it's a wonder why this isn't outspoken as compare to the holocaust that they would do decades later.
 
Today I learned that it's much much harder to cut into an eyeball than I thought.

When you dissect a cow's eye, at the very back of the cavity once you empty it out of the vitreous humor (jelly stuff with eyeball juice) it has a really cool blue_green shiny part. But I scraped it off afterwards.

The sclera keeps the eye shape, and there's a hard bony piece right behind the iris and cornea (Cornea layered over the iris) which is the lens we use to focus images, I believe.

eye06_allparts.jpg
 
LoopyPanda said:
Today I learned that it's much much harder to cut into an eyeball than I thought.

When you dissect a cow's eye, at the very back of the cavity once you empty it out of the vitreous humor (jelly stuff with eyeball juice) it has a really cool blue_green shiny part. But I scraped it off afterwards.

The sclera keeps the eye shape, and there's a hard bony piece right behind the iris and cornea (Cornea layered over the iris) which is the lens we use to focus images, I believe.

eye06_allparts.jpg
Click to expand...

The image appears to be broken.

I've learned the utterly badassery of Yue Fei who can take down an army of 500,000 strong with just 800 of them. B)
 
The formaldehyde they used? Yeah, it smelled like plastic. But it wasn't really that bad. You just had to be careful not to puncture the fluid in the vitreous humor cavity when you cut it in half. Or else you might get it everywhere.

I learned the way melanin protects our DNA from harmful UV exposure and the Vitamin D deficiency people with the Brown-Black melanin can have if they're in an area with low UV exposure. US doesn't get a lot of UV exposure as everywhere else save for the poles.

The melanin has melanocytes that shield the nucleus in the skin cells from the UV rays and let a limited amount in. Which is why sunscreen keeps most of it out but lets enough in to get vitamin D.
 
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