charlene mcbride, https://www.flickr.com/photos/ursonate/22750359393

https://commons.wikimedia.org/wiki/File:ALM_05_Dolch_edit2.jpg

Djof, https://www.flickr.com/photos/djof/147222315

Petr Kratochvil, http://www.publicdomainpictures.net/view-image.php?image=18192&picture=computer-memory-chips

https://www.reddit.com/r/WTF/comments/2fnpth/foot_of_egyptian_mummy_with_a_prosthetic_toe_3000/

https://www.pexels.com/photo/telescope-view-binoculars-viewpoint-4754/

https://commons.wikimedia.org/wiki/File:Hamatsa_shaman2.jpg

http://maxpixel.freegreatpicture.com/Human-Friends-Hiking-Leisure-Rest-Meeting-Group-2156513