Two years later , in the himalayan foothills of northern pakistan , gingerich ' s team found another weird whale clue : a partial braincase from a wolf - size creature ? found in the company of 50 - million - year - old land mammal remains ? that bore some distinctive cetacean characteristics 两年后,在巴基斯坦北部的喜马拉雅山丘陵地带,金格瑞西的团队找到另一个古怪的鲸豚线索:一个不完整的脑颅,似乎是个体型像狼的动物,可是带有一些鲸豚类独有的特徵;与它同时出土的都是5000万年前的陆栖哺乳类化石。