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.

Dr. Ciaran Hickey - Assistant Professor in the School of Physics at UCD and a member of UCD's Centre for Quantum Engineering, Science and Technology (C-QuEST) @Ciaran__Hickey @cquest_ucd @ucddublin.

Nancy Segal - Professor of Psychology, Director of the Twin Studies Center at California State University and author of 9 books about twins @nlsegal.

Ariel Zeleznikow-Johnston - Neuroscientist and author of The Future Loves You: How and Why We Should Abolish Death @ariel_zj.

Dr. Robert Hampson - Professor of Physiology/Pharmacology and Neurology at Wake Forest School of Medicine and lead author of this paper @wakehealth

Peter Ungar - Paleoanthropologist and Author of Evolution’s Bite: A Story of Teeth, Diet, and Human Origins @PeterSUngar

Christopher Preston - Professor of Philosophy at the University Of Montana and Author of The Synthetic Age: Outdesigning Evolution, Resurrecting Species, and Reengineering Our World @SyntheticAge

Caroline Curtin - Senior lecturer in the Department of Anatomy and Regenerative Medicine at the Royal College of Surgeons Ireland @CarolineCurtin8 @AnatRcsi

Garry Duffy - Professor of Anatomy and Regenerative Therapies at University of Galway @gduffy00 @uniofgalway