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Whenever I fly, one line jumps out from the pre-flight safety briefing. Somewhere between "welcome aboard" and "use this whistle for attracting attention", we're reminded to "put on your own oxygen ...

Some children are born with what scientists call a strong food reward drive, says psychologist Ashley Gearhardt at the University of Michigan. They feel extra strong motivation to eat. They're hungry ...

Optimism and pessimism aren’t unchanging traits; they tend to shift with age, although the trajectories vary from culture to culture. Nor is optimism an unquestioned good. “Extreme optimism might not ...