Scientists at Cambridge University discovered that a hormone called leptin influences the "reward centers" of the brain, which control food cravings and the pleasure we feel from eating. Learn more on this Moment of Science.

Within the hive, the queen bee releases pheromones from a gland near her jaw that effectively "brainwash" the worker bees. Learn more on this Moment of Science.

Some scientists now argue that the ability to understand and work with numbers is something that evolution has "hard-wired" into our brains. In other words, you are born with a number sense, at least in a basic way. Learn more on this Moment of Science.

The closer two numbers are, the longer it takes us to compare them. This suggests to some psychologists that we solve such problems with a mental number line. Learn more about the "Distance Effect" on this Moment of Science.

Which of the following numbers is larger: 90 or 50? 16 or 14? 9 or 7?

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