Dark matter is a phenomenon discovered by a Dutch ________ (occupation) in 1932. He noticed that galactic _______ (medication) was 400 times greater than we can ________ (verb). This is known as the “missing ________ (celebrity) problem.”
Galaxies need enough matter to hold the ________ (cookie type) together. Galaxies may be composed of a ________ (undergarment) of dark matter with a ________ (cocktail) of visible matter at the center.
Despite dark matter being ________ (percentage) of the matter in our universe, its nature has been ________ (adjective) to determine. Alternative theories state that dark matter is made of ________ (addictive substance), ________ (disease), or ________ (marital aid, plural).
All we know for sure about dark matter is that it is transparent and there is a ________ (large amount) of it. Many _______ (electronic device, plural) are underway to detect the ________ (breakfast cereal) of dark matter. In the meantime, popular culture often attributes ________ (female body part) to dark matter.
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Sources
http://en.wikipedia.org/wiki/Dark_matter
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