Executable and Linkable Format Updated 2025-07-16
For a quick and dirty introduction to the format, see: ELF Hello World Tutorial.
Feces Updated 2025-07-16
Urine Updated 2025-07-16
Fungus Updated 2025-07-16
Plant Updated 2025-07-16
Formal name: "plantae".
Matrix mechanics Updated 2025-07-16
It is apparently more closely related to the ladder operator method, which is a more algebraic than the more analytical Schrödinger equation.
It appears that this formulation makes the importance of the Poisson bracket clear, and explains why physicists are so obsessed with talking about position and momentum space. This point of view also apparently makes it clearer that quantum mechanics can be seen as a generalization of classical mechanics through the Hamiltonian.
Inward Bound by Abraham Pais (1988) chapter 12 "Quantum mechanics, an essay" part (c) "A chronology" has some ultra brief, but worthwhile mentions of matrix mechanics and the commutator.
DNA methylation Updated 2025-07-16
The first found and most important known epigenetic marker.
Happens only on adenine and cytosine. Adenine methylation is much less common in mammal than cytosine methylation, when people say "methylation" they often mean just cytosine methylation.
It often happens on promoters, where it inhibits transcription.
They are actually inheritable! But alleles are rare: www.ncbi.nlm.nih.gov/pmc/articles/PMC5559844
Figure 1.
To rats with the same genome differing only in DNA methylation with a different tail phenotype.
Source.

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