For a year in 1986-87  I wrote in the University of Guelph weekly newspaper a science column about cats.

(These are the current two, right) I was fascinated.

The next year, I became editor-in-chief.

They were the first warm-blooded pets I’d ever had that my first wife the vet student – who wrote years later she didn’t love me those 18 years but I threw off 4 good-looking daughters so she kept me around – and I named them Clark and Kent.

An Australian man said he “couldn’t breathe” while sleeping, so set up a camera to figure out what was going on.

Luis Navarro posted a series of photos on Twitter detailing the mystery he had to solve.

Using a unique Australian invention – sure your cats are fine when you’re awake but as soon as you go to sleep hell breaks loose in the kitchen, outside with the possums, anywhere

“I couldn’t breath when I slept so I installed a camera”, he tweeted.

A set of photos, still images from the camera, show Navarro’s cat staring at him in his sleep before crawling onto his face to lie down, blocking his nose and mouth in the process.

Some Twitter users responded with photos and stories of their cats doing the same thing, making it difficult for them to breathe while they slept — with others claiming Navarro’s cat was actually trying to kill him.

Doctor Rachael Stratton, a veterinary behaviourist, told 10 daily she has heard anecdotally of cats sleeping in various inconvenient places on top of people. It is often not harmful — although it can pose a problem when they try and sleep on babies in the same way