Science confronts mysteries beyond its current reach

The brief

Michael Brooks joins Mike Carruthers to examine scientific mysteries that persist across cosmology, medicine, neuroscience, and the search for extraterrestrial life.

Dark matter and dark energy account for much of the universe in current cosmology, but they may represent unseen substances, flawed equations, or phenomena beyond present understanding.

The placebo effect raises a narrower question: can expectation change how people feel without treating underlying disease, and how should researchers measure that distinction?

Experiments associated with Benjamin Libet suggest the brain may initiate actions before conscious awareness, while the power of veto keeps responsibility and free will unsettled.

The 1977 Wow! signal resembled a transmission scientists might expect from an alien civilization, yet its source remains unknown and it has not been repeated.

Across these cases, the episode treats unanswered questions as both limits on current evidence and possible starting points for future discoveries.