The "weird thing" being: 'The posture of larger cats should be different to smaller cats, but it isn't'.
“It's famously said that a lion is just a scaled-up house cat,” says Anjali Goswami from University College London, who works with Hutchinson. “That's very weird.”
"When animals get bigger, their posture changes. Their legs tend to straighten, becoming stiffer and more pillar-like to better support their weight. Not so with cats. When a lion strides across the savannah, it has essentially the same posture as the domesticated tabby that slinks over your lap. Lions, tigers, and leopards—oh my—are, as Hutchinson writes, the only large, crouching mammals."
However I agree this article could have been a tweet.