On the edges of knowledge - How do we assess claims to scientific knowledge?

On the edges of knowledge How do we assess claims to scientific knowledge?

What is it possible to know? Is the physical universe all there is, or is the immaterial part of reality too? Join radical scientist, Rupert Sheldrake, and world-leading sceptic, Michael Shermer, as they go head-to-head on where the edges of knowledge lie. Güneş Taylor hosts.