To wit: http://www.snopes.com/3d-printed-rhino-horn-developed/
They run through a litany of NGO complaints, basically presenting one side of the debate. However, as early as January of 2016, I had addressed many of those complaints elsewhere [1]. By April of 2016, a respected anti-wildlife trafficking NGO even declared that "it would be rash to rule out the possibility that trade in synthetic rhinoceros horn could play a role in future conservation strategies [2]." Things have only improved from there [3]. Yet, "what's controversial" turns into "what's false" on Snopes. After seeing how the sausage is made, there is no way I'll ever trust them.
[1] https://sosv.com/why-pembient-is-confident-in-synthetic-rhin...
[2] http://www.traffic.org/traffic-bulletin/traffic_pub_bulletin...