The fossil record is overwhelmingly a record of hard parts.
Bones, teeth and shells survive because they are mineral to begin with. Everything else — muscle, skin, fur, feathers, gut…
Source: Wikipedia
There is a wall in Cusco that tourists queue to photograph because of one stone in it, which has twelve angles and fits its neighbours on every one of…
The question worth asking at the entrance to any tunnel is what problem made digging cheaper than going around. Here are seventeen, and the answers.
1. Pedestrian River Tunnels
Source:…
Source: Wikipedia
Anyone who has left a tool in the garden knows what happens to iron. A gate goes orange, a railing flakes, and given a few seasons the metal is…
The feature that makes a fjord a fjord is the sill at its entrance - a shallow threshold of rock and debris left where the glacier terminated. Water inside is…
Every arrangement below is settled, uncontested and functioning perfectly well. What makes them remarkable is that the logic producing them was abandoned centuries ago and the lines were never tidied…