Vedci sledovaním rýb počas ich života zistili, že jednoduché správanie v strednom veku, ako pohyb a spánok, môže predpovedať dĺžku života. Fish that remained active and slept mostly at night tended to live longer than those that slowed down earlier. Fish that reduced their activity in middle age lived shorter lives. Scientists have discovered that aging does not develop smoothly, but takes place in sudden jumps between individual phases. Research suggests that everyday habits such as movement and sleep patterns can be indicators of the aging process. Tracking these habits in people could help detect early signs of aging. The work points to the potential of using simple behaviors as indicators of future life expectancy.