Clean and sharpen garden tools. Your shovels, spades, forks, and hoes take a beating and need extra care to get them ready for use next spring. A stiff wire brush should remove the worst of the dirt, but keep a piece of sandpaper handy for the really tough stuff. Next, draw a file down the end of the tool until a clean shiny edge is exposed–do not saw up and down.
Humans have been digging in the Earth since the dawn of the Neolithic Revolution, some 12,000 years ago. While the earliest agriculturalists had to make do with shovels crudely fashioned from animal bones—shoulder blades were a popular choice—later material advances (namely stone, wood, and metal) led to the development of modern shovel designs and their specialized heads are purpose-built, like spades for digging in solid soil and shovels for moving loose material like coal or grain.
One was hand dug by an army of men bearing shovels and spades working deep underground in high-risk conditions. The other boasts giant machines worth millions of pounds that bore deep below modern-day London.