[longshadow]

"...of the dark matter that comprises 90 percent of the universe."

The article is slightly misleading here; the Universe is not 90% dark matter. What they mean to say is that of the matter that exists in the Universe, 90% of THAT is dark matter.

The latest figures for composition of the Universe are something like 4% ordinary matter, 21% dark matter, and about 75% dark energy. Matter of all types accounts for only about a quarter of the total composition.

</ nit-picking mode>

[jennyp]

...the Universe is not 90% dark matter. What they mean to say is that of the matter that exists in the Universe, 90% of THAT is dark matter.

The latest figures for composition of the Universe are something like 4% ordinary matter, 21% dark matter, and about 75% dark energy.

Hmmm... but 21%/25% is 84%. So I guess you're both wrong.