Ecologist Diana Wall is known for her groundbreaking research on soil biodiversity, nematodes, and ecosystem services. Her work helped us understand how soil organisms influence carbon cycling, climate change, and sustainable agriculture. Wall conducted field research across all seven continents, notably Antarctica. A widely-published author and scientific leader, she mentored researchers around the world and engaged the public with strong science communication. The founding director of Colorado State University’s Global Environmental Sustainability School, she worked to raise awareness about the importance of healthy soils for the Earth system.