Guest: Dr Hana Jurikova, senior research fellow at the School of Earth and Environmental Sciences at the University of St Andrews.

Guest: Dr Lokesh Joshi, Stokes Professor of Glycosciences at the Infectious Diseases Section of the School of Biological and Chemical Sciences at the University of Galway.

Guest: Ian McFadden, Lecturer in Computational Ecology, Queen Mary University of London

Guest: Tristan Gooley, author of 'How to Read a Tree'

Guest: Maryn McKenna, Author and Journalist.

Guest: Erin Abner, Professor in the Department of Epidemiology and Environmental Health at the University of Kentucky.

Guests:

Les Johnson - Author & Chief Technologist with NASA @LesAuthor @IRG_Space.

Robin Tanamachi - Associate Professor in the Department of Earth, Atmospheric, and Planetary Sciences at Purdue University @tornatrix @PurdueEAPS @LifeAtPurdue.

Sam Parnia - Director of Critical Care & Resuscitation Research at the New York University School of Medicine and author of Lucid Dying: The New Science Revolutionizing How We Understand Life and Death @nyugsom_ccrs @nyulangone.

Guest: Susana Monso - Philosopher of Animal Minds at the National Distance Education University in Madrid and Author of Playing Possum: How Animals Understand Death @UNED.

Guest: Kelsey Johnson - Professor of Astronomy at the University of Virginia, former president of the American Astronomical Society & author of Into the Unknown: The Quest to Understand the Mysteries of the Cosmos @UVaAstroLabs @UVA.

Rob Shepherd - Professor in the School of Mechanical and Aerospace Engineering at Cornell University @CornellMAE @Cornell.