The Indus river valley contributed mostly math. They gave us the first signs of geometry and algebra. They also gave us the number 0 and parts of numbers like decimals. They were the first to have weight measurement systems.
They were the first discover wheelbarrows like the ones we use today. They built walls and ditches to control the rivers which was very important for them and their crops to have fresh water.
This civilization was the first to have indoor plumbing by using gravity to transfer the waste. They used drains pipes to drain their waist in to the river. This civilization drainage system was used even in England around the 1800s. They were also very architecturally advanced because they could build house with up to tree stories even though most only had one or two.
They were the first discover wheelbarrows like the ones we use today. They built walls and ditches to control the rivers which was very important for them and their crops to have fresh water.
This civilization was the first to have indoor plumbing by using gravity to transfer the waste. They used drains pipes to drain their waist in to the river. This civilization drainage system was used even in England around the 1800s. They were also very architecturally advanced because they could build house with up to tree stories even though most only had one or two.