The Daily Mail's unhealthy obsession with Kate Middleton's eyebrows - an investigation

Here's a rule-of-thumb you've probably heard of: once is a fluke, twice is coincidence, three times is a trend.

With that in mind, here's a Mail Online story from Monday:

And another from Wednesday:

And this one from Wednesday's Daily Mail:

Columnist Sarah Vine wrote today about what apparently is known as 'Eyebrowgate':

I speak, of course, of Eyebrowgate, which erupted after Kate’s first official engagement of 2016, her appointment as Honorary Air Commandant of the Air Cadets.

The fact that she became the first woman to hold this role was entirely overshadowed by her right eyebrow being a good deal thicker and darker than its sister.

Which leaves us with just one question, really: what on earth is going on?