Humans are an ingenious species. From the moment someone bashed a rock on the ground to make the first sharp-edged tool, to the development of Mars rovers and the Internet, several key advancements stand out as particularly revolutionary.
These are our picks for the 10 most important inventions of all time.
Before the invention of the wheel in 3500 B.C., humans were severely limited in how much stuff we could transport over land, and how far.
Wheeled carts facilitated agriculture and commerce by enabling the transportation of goods to and from markets, as well as easing the burdens of people traveling great distances. Now, wheels are vital to our way of life, found in everything from clocks to vehicles to turbines.