A Slice of Polar Layer Cake
#NASA #ImageOfTheDay The Martian ice cap is like a cake with every layer telling a story. In this case, the story is one of climate change on Mars.
http://www.nasa.gov/image-feature/a-slice-of-polar-layer-cake
每个人都有属于自己的一片森林,也许我们从来不曾走过,但它一直在那里,总会在那里。迷失的人迷失了,相逢的人会再相逢。愿这里,成为属于你的小森林。