Can memories survive death? It sounds like the kind of question skeptics usually dismiss before the conversation even starts. But Ian Stevenson was not a carnival psychic or a late-night ghost hunter. He was a respected psychiatrist at the University of Virginia who spent decades investigating children who claimed to remember previous lives, along with cases involving birthmarks, apparitions, telepathy, and other alleged evidence for life after death.

In this episode, psychologist and science writer Jesse Bering talks about Stevenson’s strange and fascinating career, the psychology of afterlife belief, why the mind so easily imagines consciousness continuing after death, and what to do with cases that are hard to explain but far from proven.

Jesse Bering is a science writer, research psychologist, and head of the Science Communication program at the University of Otago in New Zealand. He is the author of several books, including: Why Is the Penis Shaped Like That? And Other Reflections on Being Human and Suicidal: Why We Kill Ourselves. His new book is The Incredible Afterlives of Dr. Stevenson: One Scientist’s Epic Quest for Evidence of Reincarnation, Apparitions, Poltergeists, and Other Matters of the Soul.

Astrophysicist Hakeem Oluseyi has lived a life that sounds almost impossible: a childhood marked by poverty, violence, and constant upheaval; a teenage obsession with Einstein; a stint in the Navy; addiction and recovery; work as a janitor; and eventually a PhD in physics from Stanford.

In this conversation, Michael Shermer and Oluseyi talk about his new book, Why Do We Exist?, and the biggest questions science can ask: what came before the Big Bang, whether the multiverse is real, why the universe seems fine-tuned for life, what dark matter and dark energy really mean, and why alien civilizations may be far rarer than we hope.

Hakeem Oluseyi is a multidisciplinary astrophysicist, multi-patented inventor, award-winning author and journalist, and internationally recognized educator. His new book is Why Do We Exist?: The Nine Realms of Universe That Make You Possible.

A viral story is spreading across media: a mysterious string of scientists connected to UFOs, nuclear weapons, aerospace, and defense work have disappeared or died under suspicious circumstances. Politicians are calling it a possible national security threat.

Michael Shermer takes a skeptical look.