TIL in 1900, when submarines were being introduced to navies, Admiral Arthur Wilson called them underhanded, threatening to hang enemy sub crews as pirates. So, in 1914, when Max Horton commanded Britain's first sub engagement against the Germans, he ordered his crew to fly a Jolly Roger.

  en.wikipedia.org

TIL about Peter Oakley, known as Geriatric1927 on youtube, he was the most subscribed youtube account in 2006, in his channel he talked about his life experiences, such as growing up in the UK during WW2 and experiencing the British inter-war school system, he passed away in 2014 at 86 years old

  en.wikipedia.org

TIL researchers successfully killed MRSA (the antibiotic resistant superbug) with a blue laser and peroxide. They found a blue light can "bleach" the protective layer of the MRSA membrane which then makes it more vulnerable. This weakened it enough for hydrogen peroxide to finish the job.

How Light Turns Hydrogen Peroxide into a MRSA Treatment | The Brink | Boston University

To combat antibiotic resistant bacteria, Boston University College of Engineering researchers have invented a new blue light therapy that can kill 99.9 percent of MRSA without antibiotics.

  bu.edu