The International Union for Conservation of Nature, or IUCN, is a global organization dedicated to the conservation of nature and the sustainable use of natural resources. Founded in 1948, it brings together governments, non-governmental organizations, scientists, and experts to address environmental challenges and promote biodiversity. IUCN is known for its Red List of Threatened Species, which assesses the conservation status of various species worldwide. This list helps raise awareness about endangered species and guides conservation efforts. The organization also works on various projects related to climate change, habitat protection, and sustainable development.