Dark matter

Posted: February 22, 2013 in Current affairs

IAS Preparation Online

Dark matter throws down the gauntlet to the so-called Standard Model of physics. Elegant and useful for identifying the stable of particles and forces that regulate our daily life, the Standard Model only tells part of the cosmic story. For one thing, it does not explain gravity, although we know how to measure gravity and exploit it for our needs. And the Standard Model has been found to account for only around four or five percent of the stuff in the Universe.

Dark matter has been somewhat of a black sheep in physics. Physicists know it’s there, they know it makes up about 23 percent of the universe, but if you want to get under their skin, just ask them to explain dark matter to you.

It simply does not work with the standard model of physics and although it’s real, it often sounds like something dreamt up by…

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