 
 <prompt> Wetin cool down wen di landmasses join? Given di last question, write a context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: South America and North America join together through the Isthmus of Panama during Pliocene, wey cause South America unique animals wey dey carry pikin for belle to nearly finish. The formation of the Isthmus affect global temperatures, as warm ocean currents wey dey near equator stop to flow and Atlantic begin to cool, with cold Arctic and Antarctic waters dey reduce temperatures for the Atlantic wey don dey isolated. Africa come jam Europe wey form Mediterranean Sea, wey cut off the remaining part of Tethys Ocean. Sea level changes come expose the land wey join Alaska and Asia. Towards the end of Pliocene, about 2.58 million years ago (wey be the start of Quaternary Period), the current ice age begin. The polar regions don dey experience repeated cycles of ice and thaw, wey dey happen every 40,000–100,000 years. 