Editing Chameleon (section)

=== Bones ===
Certain species of chameleons have bones that glow when under [[ultraviolet light]], also known as [[Biogenic substance|biogenic]] [[fluorescence]].<ref name="Prötzel et al 2018">{{Cite journal |last1=Prötzel |first1=David |last2=Heß |first2=Martin |last3=Scherz |first3=Mark D. |last4=Schwager |first4=Martina|last5=Padje |first5=Anouk van't |last6=Glaw |first6=Frank |display-authors=3|date=15 January 2018 |title=Widespread bone-based fluorescence in chameleons |journal=Scientific Reports |volume=8 |issue=1 |pages=698 |doi=10.1038/s41598-017-19070-7 |pmid=29335580 |pmc=5768862 |issn=2045-2322 |bibcode=2018NatSR...8..698P}}</ref> Some 31 different species of ''Calumma'' chameleons, all native to [[Madagascar]], displayed this fluorescence in [[CT scan]]s.<ref name=":1">{{cite magazine|url=https://news.nationalgeographic.com/2018/01/chameleon-bones-florescent-ultraviolet-light-spd/|archive-url=https://web.archive.org/web/20180118173045/https://news.nationalgeographic.com/2018/01/chameleon-bones-florescent-ultraviolet-light-spd/|url-status=dead|archive-date=January 18, 2018|author=Elaina Zachos|title=Chameleon Bones Glow in the Dark, Even Through Skin|magazine=National Geographic|date=2018-01-18|access-date=2018-08-03}}</ref> The bones emitted a bright blue glow and could even shine through the chameleon's four layers of skin.<ref name=":1" /> The face was found to have a different glow, appearing as dots otherwise known as [[tubercle]]s on facial bones.<ref name="Prötzel et al 2018" /> The glow results from [[protein]]s, [[Biological pigment|pigments]], [[chitin]], and other materials that make up a chameleon's skeleton,<ref name="Prötzel et al 2018" /> possibly giving chameleons a secondary signaling system that does not interfere with their colour-changing ability, and may have evolved from [[sexual selection]].<ref name="Prötzel et al 2018" />