Template:Are You Sure/April 15

• ... that chemist and x-ray crystallographer Rosalind Elsie Franklin made contributions to the understanding of the molecular structures of DNA, RNA, viruses, coal, and graphite; but although her works on coal and viruses were appreciated in her lifetime, her contributions to the discovery of the structure of DNA were largely recognized posthumously?

• ... that Edward Norton Lorenz was a pioneer of chaos theory, and that Lorenz introduced the strange attractor notion and coined the term butterfly effect?