Including scale in photographs is important for them to hold scientific value. When you’re a geoscientist taking field-photos, humans make remarkably good scale objects. Enter palaeontologists, with their constant need to point out how much larger dinosaurs are than their research topics.
https://gizmodo.com/scale-is-deceptive-1578771839
Diego Pol next to a titanosaur’s thigh bone via CBC
http://www.cbsnews.com/news/scientists-discover-largest-dinosaur-ever-to-have-walked-the-earth/
https://observationdeck.kinja.com/paleontologists-laying-near-giant-dinosaur-bones-1578923927
