… where Dr Martin Braddock will tell us about the extreme conditions under which living creatures can flourish – and why that means we should expect to find life elsewhere in the universe. We’ll also be joined by mountaineer and photographer Tristan Cameron-Harper to tell about his Orkney travels. We’ll also look at night-sky prospects with Eric Walker, join Sandy Smith on the Great Molecule Hunt, and get some lunchtime advice on foraged foods from Wendy Barrie.

For lunch today, it’s oatcakes and cheese. The oatcakes are in triangles thick or thin, or smaller cocktail-size; and beremeal oatcakes as well. We’ve a choice of cheeses, smoked or wash-rind matured, with a touch of rhubarb and pineapple chutney. There’s ideas for a fuller Orkney lunch in our leaflet of Peedie Kirk lunch recipes, and a 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