The reason they have not been noticed by chipmakers, virologists and others who pay attention to things on the micron scale, he contends, is that, like dark matter, they are sensitive only to gravity, and relatively oblivious to the other three of nature's fundamental interactions: electromagnetism and the weak and strong nuclear forces.

ECONOMIST: Cosmology

Third, researchers have focused on so-called gene-environment interactions, reasoning that some exposures that have relatively weak associations with breast cancer in the general population may have a much stronger effect in subgroups with a specific genetic make-up.

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