Why is "Nocturnal bottleneck" trending?
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Trend Analysis
- Ranking position: #
- Date: 2026-03-31 03:23:04
This topic has appeared in the trending rankings 1 time(s) in the past year. While it does not trend frequently, its appearance suggests a renewed or concentrated surge of public interest.
Based on Wikipedia pageviews and search interest, this topic gained significant attention on the selected date.
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Wikipedia Overview
The nocturnal bottleneck hypothesis is an evolutionary biology hypothesis to explain the origin of several mammalian traits. In 1942, Gordon Lynn Walls described this concept which states that placental mammals were mainly or even exclusively nocturnal through most of their evolutionary history, from their origin 225 million years ago during the Late Triassic to after the Cretaceous–Paleogene extinction event, 66 million years ago. While some mammalian groups later adapted to diurnal (daytime) lifestyles to fill niches newly vacated by the extinction of non-avian dinosaurs, the approximately 160 million years spent as nocturnal animals has left a lasting legacy on basal mammalian anatomy and physiology, and most mammals are still nocturnal.
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Search Interest Perspective
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Search interest data over the past 12 months indicates that this topic periodically attracts global attention. Sudden spikes often correlate with major news events, public statements, or geopolitical developments.