Late at night in his dorm room, Huyen Hoang was about to fall asleep when he could not shake off what he saw — a photo of a rhinoceros dead and dehorned in Vietnam. It was 2011 when Hoang, a ...

Suspicious shapes in packages of a traveler coming from Angola led officials to rare items. Screengrab from the Thailand Department of National Parks, Wildlife and Plant Conservation’s Facebook post A ...

A seized rhino horn is shown during the destruction of a stockpile of ivory and rhino horn in Hanoi, Vietnam, in 2016. More than 2 tons of ivory and 154 pounds of rhino horn were crushed and burned on ...

In their senior year, the Hoang brothers founded Rhinoceros Horn LLC, which sought to make and sell a lab-grown version of the chief ingredient found in rhino horns — keratin. But they weren't alone.