Our guest is Luke Steller, a PhD research candidate at the Australian Centre for Astrobiology and an affiliate research scientist at the Blue Marble Space Institute of Science! Luke explores the geochemistry of ancient (i.e. fossilised) and modern hot springs systems, studying their potential to promote environments favourable for the origin of chemical life on Earth and beyond. Luke is also a science communicator, recently creating and performing in The STEAM Room, where seven scientists we’re trained by comedians to perform stand-up comedy, selling out shows at the Sydney Comedy Festival and performing at music festivals (including Splendour in the Grass).