I have created a step-by-step guide to building a #CorsiRosenthalBox. Thank you @JimRosenthal4 & @CorsIAQ for approving it. Displaying it in waiting rooms, offices, schools, and libraries will help more people stay safe this season. Please DM me if you need a PDF or another size.

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Why do B12 and folate deficiencies lead to HUGE red blood cells?
And, if the issue is DNA synthesis, why are red blood cells (which don't have DNA) the key cell line affected?
For answers, we'll have to go back a few billion years.
2/
RNA came first. Then, ~3-4 billion years ago, DNA emerged.
Among their differences:
🔹RNA contains uracil
🔹DNA contains thymine
But why does DNA contains thymine (T) instead of uracil (U)?
https://t.co/XlxT6cLLXg
3/
🔑Cytosine (C) can undergo spontaneous deamination to uracil (U).
In the RNA world, this meant that U could appear intensionally or unintentionally. This is clearly problematic. How can you repair RNA when you can't tell if something is an error?
https://t.co/bIZGviHBUc
4/
DNA's use of T instead of U means that spontaneous C → U deamination can be corrected without worry that an intentional U is being removed.
DNA requires greater stability than RNA so the transition to a thymine-based structure was beneficial.
https://t.co/bIZGviHBUc
5/
Let's return to megaloblastic anemia secondary to B12 or folate deficiency.
When either is severely deficient deoxythymidine monophosphate (dTMP*) production is hindered. With less dTMP, DNA synthesis is abnormal.
[*Note: thymine is the base in dTMP]
https://t.co/AnDUtKkbZh
Why do B12 and folate deficiencies lead to HUGE red blood cells?
And, if the issue is DNA synthesis, why are red blood cells (which don't have DNA) the key cell line affected?
For answers, we'll have to go back a few billion years.

2/
RNA came first. Then, ~3-4 billion years ago, DNA emerged.
Among their differences:
🔹RNA contains uracil
🔹DNA contains thymine
But why does DNA contains thymine (T) instead of uracil (U)?
https://t.co/XlxT6cLLXg

3/
🔑Cytosine (C) can undergo spontaneous deamination to uracil (U).
In the RNA world, this meant that U could appear intensionally or unintentionally. This is clearly problematic. How can you repair RNA when you can't tell if something is an error?
https://t.co/bIZGviHBUc

4/
DNA's use of T instead of U means that spontaneous C → U deamination can be corrected without worry that an intentional U is being removed.
DNA requires greater stability than RNA so the transition to a thymine-based structure was beneficial.
https://t.co/bIZGviHBUc

5/
Let's return to megaloblastic anemia secondary to B12 or folate deficiency.
When either is severely deficient deoxythymidine monophosphate (dTMP*) production is hindered. With less dTMP, DNA synthesis is abnormal.
[*Note: thymine is the base in dTMP]
https://t.co/AnDUtKkbZh

Now you know I love to sh-t in Harvard. But I also like accuracy. So I decided to go look at Harvard’s catalog to see its lack of military history that this article describes (they only teach history of pets it claims) and what I found shocked me! Shocked me! A thread: 1/
First off, Harvard students literally have multiple sections of military history that they can take listed. (It appears these ones are taught at MIT, so they might have to walk down the street for these) but... 2/
Say they want to stay on campus...they can only take numerous classes on war and diplomacy...3/
They have an entire class on Yalta. That’s right. An entire class on Yalta. 4/
But wait! There is more! They can take the British Empire, The Fall of the Roman Empire for those wanting traditional topics... 5/
\u201cMilitary history\u201d is only in decline if you\u2014like the author & experts in this obnoxious piece\u2014see the subject as a narrowly defined, white dude-oriented, guns & bayonets approach. The field is 1000% better off w/today\u2019s diversity of topics & historians. https://t.co/dUf3OWyVpQ
— Jonathan S. Jones (@_jonathansjones) February 1, 2021
First off, Harvard students literally have multiple sections of military history that they can take listed. (It appears these ones are taught at MIT, so they might have to walk down the street for these) but... 2/

Say they want to stay on campus...they can only take numerous classes on war and diplomacy...3/

They have an entire class on Yalta. That’s right. An entire class on Yalta. 4/

But wait! There is more! They can take the British Empire, The Fall of the Roman Empire for those wanting traditional topics... 5/

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Oh my Goodness!!!
I might have a panic attack due to excitement!!
Read this thread to the end...I just had an epiphany and my mind is blown. Actually, more than blown. More like OBLITERATED! This is the thing! This is the thing that will blow the entire thing out of the water!
Has this man been concealing his true identity?
Is this man a supposed 'dead' Seal Team Six soldier?
Witness protection to be kept safe until the right moment when all will be revealed?!
Who ELSE is alive that may have faked their death/gone into witness protection?
Were "golden tickets" inside the envelopes??
Are these "golden tickets" going to lead to their ultimate undoing?
Review crumbs on the board re: 'gold'.
#SEALTeam6 Trump re-tweeted this.
I might have a panic attack due to excitement!!
Read this thread to the end...I just had an epiphany and my mind is blown. Actually, more than blown. More like OBLITERATED! This is the thing! This is the thing that will blow the entire thing out of the water!
Tik Tok pic.twitter.com/8X3oMxvncP
— Scotty Mar10 (@Allenma15086871) December 29, 2020
Has this man been concealing his true identity?
Is this man a supposed 'dead' Seal Team Six soldier?
Witness protection to be kept safe until the right moment when all will be revealed?!
Who ELSE is alive that may have faked their death/gone into witness protection?

Were "golden tickets" inside the envelopes??

Are these "golden tickets" going to lead to their ultimate undoing?
Review crumbs on the board re: 'gold'.

#SEALTeam6 Trump re-tweeted this.
