A Columbian Mammoth skeleton (Mammuthus columbi) with tusks, which was found in La Brea Tar Pits and is now in Page Museum, Los Angeles | Martin Shields/Getty Images

The Rise of Necrofauna and the Ethical Dilemma of De-Extinction

De-extinction efforts seek to bring back a once-ubiquitous tree, a vomiting frog, and even the wooly mammoth, but they raise vexing ethical questions.

Paleontologist Jack Horner with a bird skeleton during a presentation at the Museo di Storia Naturale in Milan, Italy, in 2012 | Paolo Sacchi, Wikimedia Commons
Aurochs depicted in a cave painting from Lascaux, France | Wikimedia Commons
Britt Wray | Arden Wray
The gastric-brooding frog, now extinct, Rheobatrachus silus | Wikimedia Commons