What We Still Don’t Know – Why Are We Here? (2004)

Director: Srik Narayanan
Producer: Darlow Smithson
Genre: Documentary
Country: United Kingdom
Language: English

The Universe as a place of mystery and wonder.

Lord Martin Rees is an astrophysicist who paints a fascinating picture of how we might be changed by what we do not yet know. 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.

Astronomer Royal Martin Rees turns his attention to the structure of the universe, examining the perceived building blocks of life – atoms. However, he suggests they only actually account for five per cent of the mass of the universe, prompting a discussion with leading luminaries in the field, such as Professor Steven Weinberg and Professor Max Tegmark, about what makes up the remainder, often referred to as dark matter.

One Response to “What We Still Don’t Know – Why Are We Here? (2004)”

  1. I noticed that Professor Steven Weinberg and Professor Max Tegmark made that mistake, of trying to measure qualities of universe as quantities in a gravity-only universe again. Also, a phrase such as “mass of the universe” are bound to be images, not measurable quantities. You can think of it, but you can’t measure it. So, they speak in ways inappropriate to the topics.
    On the other hand, quite a bit of the *observable* universe is very obviously atoms, or atomic structures, in matter and plasma. They don’t notice how saying that what we can see “accounts for only 5 per cent” of the universe, makes them sound stupid. Their first estimate, from which proceed increasingly refined estimates as experimental results come in, should be 50%, say; or 80%. That’s logical.
    So why did they do that? Since they are imagining a gravity-only universe, and neglecting electromagnetism. For the non-scientists, electromagnetism is the most pervasive and strongest kind of energy in the universe, not gravity. Obviously, since EM is 39 *orders of magnitude* stronger than gravity, and can be observed at galactic distances and in similar sizes. In particular, HST showed us thousands of images containing Birkeland currents which are light-years long.

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