In the days before mass production, mass distribution and mass media, when customers knew the butcher, the baker, and the candlestick maker by name, they made little distinction between the seller and the product or service offered.

FORBES: Can't Buy Me Love: Marketing Reconnects With Our Pre-Industrial Roots

Indeed, the distribution of mass through the galaxy roughly followed the distributions of visible matter, with no need for exotic new particles.

ECONOMIST: Cosmology

Tony Tyson and David Wittman, who work at Lucent Technologies' Bell Laboratories, in New Jersey, and their collaborators have proposed building a telescope that estimates the distribution of mass in the past by analysing these deflected light-waves, a technique known as three-dimensional mass tomography.

ECONOMIST: Cosmology