Story perspectives

Sleep's Evolutionary Role Uncovered in Jellyfish and Anemones

1/11/2026

50 4

Center

Jellyfish Sleep Mechanism

A Bar-Ilan University study shows sleep is a survival mechanism, required for jellyfish and sea anemones to protect neurons from DNA damage and cellular stress.
The research finds jellyfish and sea anemones, which lack brains, sleep eight hours daily, with sleep patterns resembling human sleep.
When deprived of sleep, these animals exhibit sleep rebound and recover from increased DNA damage, highlighting sleep's evolutionary significance across the animal kingdom.

Right

Sleep's Impact on Longevity

New research from Oregon Health & Science University analyzed CDC data and found inadequate sleep may reduce life expectancy more than diet, exercise, or loneliness, with mortality risk rising nationwide.
Andrew McHill from Oregon Health & Science University urges seven to nine hours.
Dr. Daniel Amen notes sleep's importance for brain health and that sleep loss can cause poor decision-making and stress, recommending minimizing distractions before bed.

1 of 2

Jellyfish Sleep Mechanism

A Bar-Ilan University study shows sleep is a survival mechanism, required for jellyfish and sea anemones to protect neurons from DNA damage and cellular stress.
The research finds jellyfish and sea anemones, which lack brains, sleep eight hours daily, with sleep patterns resembling human sleep.
When deprived of sleep, these animals exhibit sleep rebound and recover from increased DNA damage, highlighting sleep's evolutionary significance across the animal kingdom.

1 / 2