What are 2 of the most important discoveries in the last 2 million years?

Two of the most important discoveries in the last 2 million years include the development of agriculture around 10,000 years ago, which transformed human societies from nomadic hunter-gatherers to settled communities, enabling population growth and the rise of civilizations. Another significant discovery is the invention of the wheel around 3,500 BCE, which revolutionized transportation and trade, facilitating the movement of goods and ideas across vast distances and contributing to technological and cultural advancements.