Source: Wikipedia
Look at a map of Britain or northern Italy and certain roads stand out immediately. They run straight across the landscape for miles, ignoring the contours, occasionally kinking at…
The metric system is the most successful standardisation project in history. It is used by almost every country on Earth, it underpins science globally, and its units have been redefined…
These are not clocks with decoration added. They are astronomical instruments that happen to display the hour, built when the position of the sun and moon mattered to planting, sailing…
An aqueduct is mostly invisible. The famous arched bridges are the short sections where a valley had to be crossed; the great majority of any system ran underground or along…
Source: Wikipedia
There is a limit to how loud a sound can be, and it is lower than most people assume.
Sound travels as alternating regions of higher and lower air…
Source: Wikipedia
Ask anyone to picture an aircraft black box and they will picture something black. It is one of the most widely held misconceptions about aviation, and it is wrong…