Almost everybody has experienced this, and almost nobody has considered how strange it is.
Sitting still in a vehicle, entirely uninjured, having eaten nothing unusual, a person becomes progressively unwell…
Before printing, every copy of every text was made by hand and therefore differed from every other copy. Almost everything below follows from that changing. Here are sixteen.
1. Paper…
The test is simple: pigment colour looks the same from every angle, and structural colour changes as you move. Once you know that, a great deal of the natural world…
Ask most people whether counting is natural and they will say obviously yes. Every culture counts. Children learn numbers early. It feels less like a skill than a faculty.
The…
Source: Wikipedia
For families in 1979, television was the center of the living room and the heart of the evening's entertainment. With only a handful of channels and no way to…
Pitch depends on how fast something vibrates, and everything below is a different method of controlling that rate and then getting the vibration into the air loudly enough to hear.…