Yesterday Daughter told me we cannot exist without water. It was a remark pretty much out of the blue and it baffled me. Where did such knowledge come from? Luckily the Man was there to explain: it was from a book written by our only Dutch astronaut André Kuipers. This particular information was in the book we lent from the library and apparently I hadn’t read it to Daughter before it was returned.

But there she sat, three and a half years old, confidently explaining how one could or couldn’t survive in space. During my mother’s childhood, it was all science fiction still.

And when I then think of all the things we still don’t know of the planet we live on I sometimes wonder how human beings were ever able to walk on the moon.