A 100-nanometre glass bead is a thousandth of the width of a human hair (31 August, p 16).
Orkney is in Scotland, off the mainland (24 August, p 47).
Published 11 September 2024
A 100-nanometre glass bead is a thousandth of the width of a human hair (31 August, p 16).
Orkney is in Scotland, off the mainland (24 August, p 47).
Issue no. 3508 published 14 September 2024