Everything turns out, in time, not to be what we thought it was.

Women’s fertility, thought to hit a precipitous slide downward from the age of 27 – or 35 – or some other number conjured up by dubious science, may decline in general/on average. But then it turns out fertility is not quite that simple.

“But it’s no wonder we’re so easily panicked. The fearful narrative around women’s fertility fits with a broader theme that’s become all too common as women have gained economic independence over the last several decades: we’re going to pay for our equality. Mothers going to work in the 1980’s were told they were subjecting their kids to an epidemic of sexual abuse at daycare centers. In 1986, Newsweek reported that 40-year-old single women were “more likely to be killed by a terrorist” than find a husband. These stories and many more like them, of course, are completely false. Perhaps the best way to fight the panic is to question those who’ve made a business of selling it.”

Pregnancy after 40 is becoming quite common. In fact, in the UK at least, the number of over-40 pregnancies outnumbers the under-30 pregnancies for the first time in 70 years.

I lived for years in Iceland, where it is quite common to have children (many, in fact) when you’re quite young (late teens/early 20s). This is seen as the norm. When a non-Icelandic friend lived in Iceland, everyone around her hounded her about having a baby before she was an “old hag” (meaning mid-20s, I guess???). She did not have a child until she moved to Denmark, and by then she was in her late 20s. The Danes, though, insisted that she was “so young” to be having a child, and all the other women in her maternity ward had at least ten years on her.

And this very pressing issue – fertility – reminds me not only that life goes on but also that, as it does, there are so many other things we don’t know shit about but pretend to (or to trust experts about them): Addiction, aging, the brain, radiation, education, the powerhouse Japan was supposed to be… or even pasta. Nothing is definitive – it keeps changing as the environment around it changes. We really don’t know anything – even what consciousness means.

The same can be said of people, but that’s another and different challenge.