Sundaland

Sundaland, also called Sundaica, is a biogeographical region of Southeast Asia corresponding to the continental shelf that was repeatedly exposed as dry land over the last 2.6 million years whenever sea levels fell. It includes the Indonesian islands of Sumatra, Java, Bali, and Borneo along with the Malay Peninsula, and covers about 1,800,000 square kilometers including the Java Sea and the Gulf of Thailand. During the Last Glacial Maximum, roughly 110,000 to 12,000 years ago, lower sea levels connected these islands to the Asian mainland by land bridges, creating a single continuous landmass and ecosystem. Sundaland eastern boundary is the Wallace Line, which marks the eastern limit of Asian mammal fauna and separates it from the transitional region of Wallacea and from Australasia beyond. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/