The researchers have found that almost all the illegal ivories are from recent poaching. Meanwhile, humans are not only animals that are farsighted!

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Sources:

http://www.pnas.org/cgi/doi/10.1073/pnas.1614938113
https://www.fws.gov/lab/ivory_defined.php
http://science.sciencemag.org/content/349/6243/84.full
https://www.eurekalert.org/emb_releases/2016-11/teia-iia110216.php
https://www.eurekalert.org/emb_releases/2016-11/uou-tti110216.php

https://www.eurekalert.org/emb_releases/2016-11/cp-abi102816.php
http://www.cell.com/current-biology/fulltext/S0960-9822(16)31068-5
http://www.cell.com/cms/attachment/2071096090/2068120537/mmc1.pdf
https://nei.nih.gov/health/errors/presbyopia

Image Sources:
https://www.dropbox.com/sh/5vzbjyu0720ynw2/AADk9JRHdSDBWcBOda8vV8kZa?dl=0&preview=Image+2.jpg

Saving the Elephants with Carbon Dating

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