# data[].attributes.attachment_caption
A representation of nucleic acid structure, which is what Miescher first observed. 

# data[].attributes.headline
1869: Frederick Miescher - Discovery of DNA

# data[].attributes.subject
1869: Frederick Miescher - Discovery of DNA

# data[].attributes.body
In 1869, Frederick Miescher first isolated and discovered a compound (DNA - made of nucleic acids) in white blood cells, which he originally called "nuclein." He soon discovered that this phosphorus and nitrogen-rich molecule could be found in other cells, too!

https://www.genome.gov/25520232/online-education-kit-1869-dna-first-isolated

# data[].attributes.attachment_caption
The test Griffith used to determine if bacteria were able to pass certain materials over and determine the survival of the mice.

# data[].attributes.body
In 1928, Frederick Griffith discovered that certain strains of bacteria can transform based on the way their genetic material interacted. He isolated two types and discovered that DNA might be the genetic material causing this transformation.

https://www.britannica.com/biography/Frederick-Griffith

# data[].attributes.attachment_caption
Similar infographic to that of Griffith (but more detailed) that describes the effects of certain bacteria strains on mice, which was the experiment.

# data[].attributes.body
In 1944, Oswald Avery and his group proved the connection between DNA and heredity (originally theorized by Griffith), mentioning that it was a form of genetic material that could carry and pass on vital pieces of information. In conjunction with Griffith's work, this would be called the "transforming principle."

https://www.sciencedirect.com/science/article/pii/S0960982213015157#:~:text=On%201%20February%201944%2C%20the,from%20one%20type%20to%20another

# data[].attributes.attachment_caption
A still from a YouTube video that demonstrates the roughly equivalent amounts of corresponding nitrogenous bases. 

# data[].attributes.body
Erwin Chargaff planted the seeds for Watson and Crick's eventual discovery of the structural component of DNA. In 1950, he found that adenine and thymine levels were about the same in DNA, and cytosine and guanine were similar, too. This was the main one out of Chargaff's two award-winning rules.

https://nationalmedals.org/laureate/erwin-chargaff/#:~:text=Erwin%20Chargaff%20was%20one%20of,amounts%20of%20cytosine%20and%20guanine.

# data[].attributes.attachment_caption
One of the original photos of DNA structure captured using X-ray diffraction by Wilkins. A double helix is slightly visible at the middle.

# data[].attributes.body
In 1951, Wilkins began to extract proof of DNA's structure using his expertise with X-rays and their "diffraction." This directly contributed to Watson and Crick's upcoming experiments, which used the images/data from Wilkins's work.

https://www.whatisbiotechnology.org/index.php/people/summary/Wilkins#:~:text=Wilkins%20is%20most%20well%2Dknown,double%2Dhelix%20structure%20of%20DNA.

# data[].attributes.attachment_caption
Phosphorus made it into the cell, meaning that it's acceptant to it. This parallels DNA's phosphate group, which (by this experiment) is known to be native.

# data[].attributes.headline
1951-1952: Martha Chase and Alfred Hershey

# data[].attributes.subject
1951-1952: Martha Chase and Alfred Hershey

# data[].attributes.body
Throughout 1951 and 1952, Chase and Hershey worked to identify deoxyribonucleic acid (DNA) as the compound of genes. At this point in history, there was confusion as to whether genes were composed of proteins or DNA, but the two scientists' work helped clarify this (proving that they were, in fact, made up of DNA).

https://embryo.asu.edu/pages/hershey-chase-experiments-1952-alfred-hershey-and-martha-chase

# data[].attributes.attachment_caption
An effigy of DNA's helical structure that was made using photo 51, which you can refer to in the post about Wilkins. 

# data[].attributes.body
In 1952, Rosalind Franklin discovered the double-helix structure that people commonly associate with DNA. Additionally, she was able to measure the density of this form of genetic material, and this was all possible using a form of X-ray. Importantly, however, she wasn't given much credit for her work (for a multitude of reasons, one being the fact that gender equality was quite lacking in the 20th century).

https://embryo.asu.edu/pages/photograph-51-rosalind-franklin-1952#:~:text=On%206%20May%201952%2C%20at,of%20deoxyribosenucleic%20acid%2C%20or%20DNA.

# data[].attributes.attachment_caption
A representation of Pauling's triple-helix model for the structure of DNA.

# data[].attributes.body
Around the same time, in 1952, Linus Pauling suggested that DNA may be triple-stranded. This, of course, was eventually disproven in favor of Franklin, Watson, and Crick's model, which showed a double-stranded helix.

https://dnalc.cshl.edu/view/15512-Linus-Pauling-s-triple-DNA-helix-model-3D-animation-with-basic-narration.html#:~:text=In%201952%2C%20Linus%20Pauling%20proposed,stranded%20helix%20structure%20for%20DNA.

# data[].attributes.attachment_caption
Watson and Crick's final model of DNA structure, and you can see the nitrogenous base pairings (and the work of all these other scientists) culminating here.

# data[].attributes.body
Watson and Crick worked with Franklin in discovering the structure of DNA. Unbeknownst to her, however, Wilkins notified them about her discoveries! Although they had contributed somewhat to the double-helix model, they unfairly left without giving the greatest contributor, Franklin, much credit. In 1953, they published "their" new discovery of DNA's structure being similar to a double-helix.

https://www.bbc.co.uk/history/historic_figures/crick_and_watson.shtml#:~:text=Watson%20and%20Crick%20worked%20together,the%20hereditary%20information%20for%20cells.&text=In%20April%201953%2C%20they%20published,known%20features%20%2D%20the%20double%20helix.