The human brain is a big believer in equality—and a team of scientists from the California Institute of Technology (Caltech) and Trinity College in Dublin, Ireland, has become the first to gather the images to prove it.

Neuroscientists have tied the human aversion to losing money to a specific structure in the brain – the amygdala.

Investing money, getting married, switching jobs: All big decisions tinged with uncertainty, loaded with risk. Now, a new brain-imaging study finds that the higher the level of uncertainty, the more likely it is that emotion, not logic, will guide those choices.

In this reply to Professor Prentice's article, Professor Mitchell offers some additional thoughts in favor of a modest approach to revising the law's assumption of rationality, as compared to the bolder approach argued for by Professor Prentice.

Feb. 6--At a brain-imaging lab in Pasadena last week, a dozen volunteers lay down one after another inside a banging, clanging magnetic scanner to watch movie trailers. As the two-minute clips unfolded, Caltech professor Steven Quartz and two technicians examined the viewers' brains.