You certainly don't see these kind of images every day, from tick close up, x-ray of a bat, to a high-tech micrograph of a zebrafish embryo. Check out some of the best images of the year.
Sailing stones, also called sliding or moving rocks is a geological phenomenon where rocks tend to move and leave long tracks into a valley surfaces like deserts without human or animal intervention.
Another questioner to test your basic knowledge of the German language and build up your knowledge profile stats, this time you will go through some nature oriented questions.
