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Content Guidelinesplugin-autotooltip__plain plugin-autotooltip_bigContent guidelines

Ideas for new topics are always welcomed, from experts and non-experts alike - if you're not sure if they'll be accepted by other editors, put them in the 'Proposed content' section for approval. The easiest way to create a new page is to use the

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At present, only registered users can create and edit articles. The registration process is very straightforward. Just click the 'Register' link at the top right of any page.

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How to edit pagesplugin-autotooltip__plain plugin-autotooltip_bigEditing pages

Once you're logged in, a grey floating 'Tool' menu at the right hand side of the screen enables access to all the main 'Content Pages' for editing. (Note: Some pages, such as the site info etc. are locked)

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Importance Ratingsplugin-autotooltip__plain plugin-autotooltip_bigImportance ratings

In a departure from the usual Wiki format, Wikenigma assigns 'Importance Ratings' to some pages.

The idea is to separate articles which are considered (by the editors) to cover exceptionally important unknown issues from those which (although also u…

Faqplugin-autotooltip__plain plugin-autotooltip_bigFrequently Asked Questions

Q. Why the weird syntax? A. Like most Wikis, the site doesn't use HTML for formatting (security reasons etc). A guide to the special syntax can be found here. Unfortunately it can be quite confusing at first - but there's now a new 'Visual …

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• Oct 2020 : A milestone of 500 unknown articles has been reached.

• Aug 2020 : Currently (beta) testing the new 'WYSIWYG' (What You See Is What You Get) page editor. It greatly simplifies the editing process, avoiding the need to learn th…

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Please note that in common with other publicly editable wikis, this website is not responsible for content posted by the public. Nevertheless, the ongoing editing process should be able to remove unsuitable content in a reasonable time. If you…


541 unknowns listed

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Wikenigma - an Encyclopaedia of Unknowns Wikenigma - an Encyclopaedia of the Unknown Science

Dark Energy

“The observational results of the latest 15 to 20 years have established a standard model for the cosmology which has some amazing consequences. A mysterious entity, the dark energy, has been confirmed as the dominant component of the Universe, and is also responsible for its accelerated expansion. However, its physical nature remains unknown. Unveiling the nature of the dark energy is one of the main problems of cosmology.”
Source: The Dark Energy Survey: Status and First results Nuclear and Particle Physics Proceedings Volumes 273–275, April–June 2016, Pages 302–308, 37th International Conference on High Energy Physics (ICHEP)

Dark Energy is currently believed to make up 68.3% of the universe, and is the most accepted hypothesis to explain various observations (beginning in the 1990s) indicating that the universe is expanding at an accelerating rate.

Theories of Dark Energy include:

• As a form of the Cosmological Constant • A result of Modified Gravity • Quintessence - a newly proposed dynamical field • As a result of Time Variations by observers etc

Currently, none of the proposed theories has enough evidence to be accepted by all theorists.

Note: Unlike Dark Matterplugin-autotooltip__plain plugin-autotooltip_bigDark Matter

"“The nature of the dominant component of galaxies and clusters remains unknown.”"

Source: Measuring the dark matter equation of state (Mon. Not. R. Astron. Soc. 415, L74–L77)

In the 1930s, astronomical observations of galaxy rotations showed that the ou…
, which is believed to exist in so-called 'halos' around galaxies, Dark Energy would necessarily pervade every part of the entire universe - but no effects have ever been detected in any experiments on Earth, or in our 'local' space research. The calculated 'push' of dark energy, however, is very low :

“The amount of dark energy contained in the volume of the entire Earth is about as much as the amount of electricity used by the average US citizen every year […]”
Source: '13.8' by John Gribbin, pp. 210-211

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