Hibernation

"...half its body weight in nectar daily just to stay alive. At night, when it can't feed, the hummingbird does something remarkable: it enters torpor, a hibernation-like state where its metabolic rate drops dramatically, its body temperature falls, and it essentially shuts down non-essential systems."

"Book 2, Chapter 1: Hibernation & Reserve Strategy Opening: The Bear That Didn't Wake Up In March 2018, wildlife biologists in Yellowstone found a grizzly bear dead in its den...."

"...orage: 25-30% energy loss (synthesis inefficiency + carrying costs), plus mobility reduction and opportunity costs. So why store fat?** Because hibernation requires it. A bear entering hibernation in November at 400 pounds (insufficient fat) will die in February."

"...l adaptation: Matches human biological rhythms - Summer: Longer days trigger activity increase, but also wanderlust - Winter: Shorter days, natural hibernation tendency, easier to focus indoors - Aligning with (not fighting) these rhythms reduces friction Circadian rhythm at organizational level**: - Peak..."

"... 2-3 weeks, it reheats to 98°F (37°C) for 12-24 hours, burning precious fat reserves. The rewarming costs 86% of its winter energy budget. The actual hibernation (cold state) costs only 14%. The paradox: The squirrel saves energy by cooling down, but spends most energy warming up. The cooling is cheap."