ལྡུམ་མཆེད་དུས་རབས།
biol. The Devonian period lasted from about 409 million to 363 million years ago. During this period fish became abundant; the first amphibians evolved, and the first forests appeared ལྡུམ་མཆེད་དུས་རབས་ནི་ལོ་ས་ཡ་ […]
biol. The Devonian period lasted from about 409 million to 363 million years ago. During this period fish became abundant; the first amphibians evolved, and the first forests appeared ལྡུམ་མཆེད་དུས་རབས་ནི་ལོ་ས་ཡ་ […]