A new study examining lemurs suggests that humans may not have evolved to be strictly daytime creatures, according to Earth.com. The research, reported by Earth.com, indicates that our activity patterns could be more flexible than previously assumed.
The findings challenge the long-held belief that humans are naturally diurnal, or active during the day. Instead, the lemur research points to a more complex evolutionary history, one where early primates may have been active at various times, including at night.
Earth.com reports that the study uses lemurs as a model to understand the origins of human sleep-wake cycles. Lemurs are primates, making them a valuable comparison for understanding our own evolutionary past. By observing their behavior, scientists can infer how early primate ancestors might have lived.
The key takeaway, according to Earth.com, is that the human tendency toward daytime activity may not be a hardwired trait. The research suggests that our ancestors could have been active in low-light conditions, and that this flexibility may still exist within us.
This does not mean humans are becoming nocturnal, but it does open the door to reconsidering how we view our daily rhythms. The study adds to a growing body of evidence that primate activity patterns are more adaptable than once thought.
What to watch next: Further research may explore whether this flexibility is still present in modern human biology, potentially informing how we approach shift work and sleep health.
