Huh 
Iceland is not naturally incapable of growing trees. Settlement-era cutting, centuries of grazing and fragile volcanic soils reduced its birch woodland, while cold, wind and erosion made recovery painfully slow.
Victorians turned human hair into jewellery because it was durable, intimate and unmistakably connected to a person. It commemorated the dead, but it also marked love, friendship and family ties.
Garlic smell lingers because cutting a clove creates reactive, pungent sulfur compounds that spread into skin oils and around nails. Soap, water and thorough mechanical cleaning are the reliable first response.
Songs get stuck in your head when musical memory starts replaying a short, highly retrievable fragment without deliberate effort. Recent exposure, repetition and idle attention all make an earworm more likely.
Incognito mode is useful for keeping a browsing session out of your device’s normal history, but it does not disguise your IP address, hide you from websites or make you anonymous online.
Geckos cling to ceilings using millions of branching hairs that create enormous close contact with a surface, combining countless tiny molecular attractions.
London black cabs turn tightly because licensed taxis must pass a demanding manoeuvrability test. Their steering and body layout are designed around it.
Box beds put a sleeping space inside a wooden enclosure. In crowded, chilly homes, they provided warmth, privacy and efficient use of the main living room.
Ice cream becomes icy when small crystals melt and reform as larger ones. Temperature swings, slow refreezing and poor storage gradually wreck its smooth texture.
A growling stomach does not automatically mean hunger. The noise usually comes from ordinary contractions moving gas and liquid through an emptier digestive tract.