It’s an art and a science, say Prof. Graham Machin of the National Physical Laboratory. It started in the 17th century with Galileo’s thermometer and the work of the Florentine Academy of Science. By the 19th century, there were three separate temperature scales. Then with Lord Kelvin came a deeper understanding of temperature and further scales and the concept of absolute zero. What might this century bring?
You can watch this free livestreamed event from here, or if you’d like to join questions and discussion, you can also go direct to it in the Science Festival’s YouTube channel
The online tables that follow are also free to attend but numbers are limited, book your place early using this online form.