On: Sleep tweaks boost night owls' wellbeing

[tayo42]

What does the percentage mean exactly? Sounds like you can have a preference but it's really under your control?

Did other animals develop a similar group sleeping pattern? Humans wouldn't be the only ones to potentially benefit

[pseudalopex → tayo42]

The article explains that the other 30-60% is influenced by environment and age. Other animals have similar variation in sleep patterns.