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Just Buy It: Impulsiveness Tied To Brain ChemicalFrom proposing to a loved one to going on a shopping spree, many of life's decisions are guided by the brain chemical dopamine. Scientists now say dopamine might explain why some people are more impulsive than others when it comes to planning and thinking.
The Food Chain's Weak Link: Tiny Ocean Plants DyingMicroscopic plants in the ocean are among the most important creatures on Earth and produce half of the planet's oxygen. But they are in trouble. A new study finds that since 1950, the amount of phytoplankton in the ocean's surface waters has declined by 40 percent.
Why Do We Like What We Like?Why do we enjoy things like bitter foods and horror films? And are we the only species that likes art? Paul Bloom, professor of psychology at Yale University and author of <em>How Pleasure Works,</em> explains our penchant for art and why we find some unpleasant things so enjoyable.