Letter: Size of a bus

From John Cannell

So the NuSTAR X-ray telescope unfolds to the length of a school bus (16 June, p 6). What’s the difference between an ordinary bus and a school bus? Is it like American gallons and UK gallons? Ten metres, as mentioned later in the article, will do fine, thank you.

On a plus note, I suppose at least I now know how long a school bus is.

The editor writes:

• That would be a yellow, American school bus of course, a little longer than a British bus.

Brentwood, Essex, UK