https://search.yahoo.co.jp/image/search;_ylt=A2Riohc6SWNcAj0ALgqU3uV7?p=Sand+dunes...on+Mars+With+an+elongated+crescent+form&aq=-1&oq=&ei=UTF-8

https://search.yahoo.co.jp/image/search?p=%E7%81%AB%E6%98%9F%E3%81%AE%E7%A0%82%E4%B8%98&ei=UTF-8&fr=slv1-acsy15#mode%3Dsearch 

植物か!?