The Solar System contains 18 or 19 natural satellites of planets that are large enough for self-gravity to make them round. (Why the uncertain number? Neptune’s moon Proteus is on the edge.) They are shown here to scale with each other. Two of them are larger than Mercury; seven are larger than Pluto and Eris. If they were not orbiting planets, many of these worlds would be called “planets,” and scientists who study them are called “planetary scientists.”
crypsis is the ability of an organism to blend in with its environment, as seen here in (click pic) grasshoppers, mantids, geckos (three in the fifth photo), toads (three in the ninth photo), snakes and katydids, all of which have evolved to mimic or become inconspicuous amongst leaves. photos by (click pic) john cancalosi, christian zeigler, mattias klum and thomas marent.
"…from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved." - charles darwin