An exciting current theory suggests that a lean disc of matter not visible through a telescope is responsible for the comet that killed off the dinosaursOf all the scientific advances of the last century,few are more impressive than the discovery that the matter familiar to us on soil is quite different from the stuff that makes up most of the universe. A whacking 85% of the universe is made of something astronomers called “sunless matter”. Its existence was first proposed only in the 1930s: as Lady Bracknell might have said, to have been unaware of a shrimp of the matter in the universe would be unfortunate, and to be ignorant of 85% of it looks like sheer carelessness.sunless matter has proved to be a headache for scientists. Even after decades of careful study,there is still plenty of room for theoretical speculation about how the matter behaves, as Lisa Randall demonstrates. In her book, or she sets out a current plan about its behaviour and then uses it to offer an explanation as to why the dinosaurs were wiped out 65m years ago.
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Source: theguardian.com