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A 2025 meta-analysis covering more than 2.5 million people found that people who trust others more consistently report greater well-being — and the relationship appears to feed itself. Longitudinal studies showed that trust predicts greater future well-being, while greater well-being predicts more future trust, creating what researchers describe as a mutually reinforcing cycle.

A meta-analysis of more than 2.5 million people found a consistent link between trust and subjective well-being, with small prospective effects running in both directions.

For decades, one of the most replicated findings in happiness research was a U-shaped curve: people were relatively happy when young, hit their lowest point around middle age, then recovered as they grew older. A 2025 study spanning 44 countries found that pattern has effectively disappeared — young adults now report the highest levels of psychological distress, and ill-being falls steadily with age.

A 2025 study found that the old midlife hump in ill-being has vanished across recent data, largely because psychological distress has risen sharply among younger adults.

In 1938, Harvard began following 268 young men to see what made a good life, and after more than eight decades the clearest predictor of health and happiness in old age wasn’t wealth or career — it was the quality of their close relationships

The Harvard Study of Adult Development followed 268 young men starting in 1938, and after more than eighty years of measurement, the strongest predictor of health and happiness in old age was not wealth, career, or status. It was the quality of their close relationships.

Sperm whales sleep vertically in silent pods near the ocean surface, tails down and heads up, drifting motionless in groups of five or six for roughly 10 to 15 minutes at a time before waking to breathe

Sperm whales rest in one of the strangest ways in the animal kingdom: hanging vertically in silent pods just beneath the ocean surface, releasing tiny gas bubbles to control their buoyancy, and sleeping in bursts of only 10 to 15 minutes. Here is how biologists uncovered the behavior — and what it reveals about cetacean intelligence.

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