About 74,000 years ago, a volcano erupted and collapsed in on itself on Sumatra. The resulting crater later filled with water and became known as Lake Toba (pictured).

• 意译：精致的地球：每日图片。大约74000年前，一个火山爆发和倒塌在苏门答腊。由此结果产生的火山口后来灌满水和变成称为多巴湖（如图）。