There is a strong intuition that coordinated group movement requires coordination — something issuing instructions, or at minimum some shared signal that everybody is responding to.
That intuition is wrong,…
There is a tendency to think of agricultural history as a matter of which crops were grown, and the tools receive far less attention than the plants.
That gets the…
Source: Wikipedia
There is a class of invention that is invisible because it is too small to notice, and fastenings are the clearest example on any person's body right now.
The…
Everything about a lake follows from how its basin was made. Ice, movement of the crust, volcanic collapse, dissolving rock and a river changing its mind all produce lakes, and…
Source: Wikipedia
It was the only occasion in the year when a household deliberately went outside in the cold after dark and stayed there, which is why the memories are so…
The question to ask at any bridge is where the force goes. Straight down, outward against the banks, up into a tower, or along a chain of triangles - and…