… with mountaineer and photographer Tristan Cameron-Harper back to see us with more scenes from his travels in Orkney. Eric Walker looks upward into the Orkney night sky, and Sandy Smith brings us news of the outcome of the Great Molecule Hunt and draws the winner from the all-correct entries. And Wendy Barrie joins us to add some foraged flavours to our lunch.

We’re having sandwiches for lunch today – spread with Orkney butter and filled with Orkney spiced beef, red onion chutney, sliced cucumber, lettuce and tomato. We’re rounding off with a cup of Orkney tea or coffee, and some syrup biscuits and ginger parkins. If you’d like to try some further options, download our leaflet of Peedie Kirk lunch recipes, and our booklet about foraging food options as well.

You can watch this free event from here, through the YouTube link below, or if you’d like to join questions and discussion, you can also go to the Science Festival’s YouTube channel

Today’s event includes the presentation to Dr Edvard Kobal of a tune specially composed by fiddle-player Jennifer Wrigley, and played by her with Laurence Wilson’s piano accompaniment.