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The Breathtaking Pennsylvania Park With Tranquil Lakes, A Massive Boulder Field, And Hidden Waterfalls
As one of the most distinctive remnants of past ice ages, the Hickory Run Boulder Field is recognized as a National Natural ...
中国日报网1mon
Chinese scientists discover 'rocket effect' driving boulder movement on comet surface
which likely happened because the boulder's movement exposed icy layers beneath it. As remnants of the primordial solar system, comets tell a lot about the early stage of solar system, making them ...