古生物化石的发现往往具有偶然性。一次,我在整理库房标本时,在一堆残破的化石中,发现一些外形似鹅蛋的化石,仔细一看,是些残破的动物头骨。后经精心修理,把残破的脑颅骨全部剥去,十多个非常完整而精美的脑化石一一显露出来。最近我馆的技术人员在修理产自甘肃和政地区的板齿象时,在骨盆中发现一饭碗大小、石核状的东西,取出后发现又是一枚完好无损的脑化石。这个脑化石可能是在随该动物遗体被水搬运、冲击的过程中,从脑颅中滚落到骨盆中,与 The discovery of paleontological fossils is often accidental. Once, when I sorted out the treasury specimens, I found some fossilized goose-like fossils in a pile of broken fossils. Looking closely, I found some broken animal skulls. After careful repair, the broken brain skull all stripped, more than a dozen very complete and beautiful brain fossils revealed one by one. Recently, when the technical staff of our museum repaired the banana teeth produced in Gansu and Hezheng areas, they found a bowl-shaped and stone-like object in the pelvis. After removal, they found that they were intact brain fossils. This brain fossil may be rolled into the pelvis from the brain in the process of being transported and impacted by the body of the animal,