Crystallographers - The Braggs - "Multicoincidental"!

Yesterday afternoon, 28th November 2013, my elderly neighbour was telling me over tea about the Radio 4 programme that morning -Melvyn Bragg's, In Our Time - the subject being "The Microscope". She knows little about science but was fascinated by the discussion on the electron microscope. I am a scientist, and our general conversation wandered around the subject and happened to extend to me telling her about the subject of crystallography and about William and Lawrence Bragg, father and son, who jointly won the Nobel prize in 1915 for their pioneering work in the subject. </p> <p>That evening I happened to watch the quiz programme - "Eggheads" on BBC2 (Series 10, Episode 124, first broadcast January 2010). One of the five contestants who each declared their names and occupations identified himself as a crystallographer (a pretty unusual occupation to declare!). This was the first, but minor coincidence. </p> <p>Then, of the various possible subjects that feature (History, Music etc), Science happened to come up and the crystallographer, being the scientist on the team, elected to compete against a resident Egghead. He chose to answer one set of three multiple choice questions (he could have chosen another set). The third question he was asked was "What was the surname of the two crystallographers who in 1915 became the first father and son team to be awarded a Nobel prize?" Of course he knew the answer. So, a second coincidence, I reckon, both within the Eggheads programme and, more significantly, for me following my earlier conversation. </p> <p>Then today, 29th November, having decided to enter my asserted coincidences on your website, I looked up yesterday's "In Our Time" on the Radio 4 website to check its content and found (wrongly as it turns out below) that the subject of the programme my neighbour had listened to was actually "Crystallography" - not "The Microscope". </p> <p>I 'phoned my neighbour to jokingly chide her that she had entirely misunderstood the theme of the programme but she was adamant that she had been correct. I then went back to the Radio 4 website to read her the synopsis of the programme only to find that I must have accidentally and erroneously clicked on "In Our Time" for 29th November -2012 ! - not 28th November 2013. And the subject was "Crystallography"! - a calendar year to the day. Third coincidence! </p> <p>I can find no information, logic, patterns etc that connect these events. True coincidence(s)?