Hacker News new | past | comments | ask | show | jobs | submit login

Nature's insulation is fat and fur/feathers but there is a limit to how much that can help. It adds weight and bulk - hummingbirds have to hover their own weight so adding more fat is like making bigger rocket: you need more fuel to lift your fuel.



Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact

Search: