What We Still Don't KnowThe Universe is still a place of mystery and wonder. As a cosmologist, I am exhilarated that we can make some progress towards tackling what seem very fundamental questions.

These programs focus on: Was there a beginning? Whether we are alone? What's the future of the cosmos?

What is the nature of reality? With each advance, new questions come into sharper focus. The key issue is what we still don't know.

Sir Martin explores the possibility that life exists on planets beyond our own. He unveils an unsettling scientific debate that has startling consequences for us Earthlings. Do you believe in aliens? If not, a quick glance through these pages might change your mind!

Everything you thought you knew about the universe is wrong. It’s made of atoms, right? Wrong. Atoms only account for a measly 15% of everything that exists. The mass of the universe consists of something so mysterious and elusive that it has been dubbed ‘dark matter’.

There is a fundamental chasm in our understanding of ourselves, the universe, and everything. To solve this, Sir Martin takes us on a mind-boggling journey through multiple universes to post-biological life. On the way we learn of the disturbing possibility that we could be the product of someone else’s experiment.

Episodes: Are We Alone?, Why Are We Here? and Are We Real?

Watch the full documentary now (playlist)