 Thank you to Dr. Sultanat Mambatova and to Heather for the question. If you have a question for the team, you can email us on unexpected at bbc.co.uk or our WhatsApp number for voice notes and texts is plus44 330 678 3080. And I mentioned loving a postcard. You can write to us at Unexpected Elements, BBC World Service, Cardiff, CF10 4GA in the UK.