QUIZ: How much do you know about the American West's wild horse population?
A recent evaluation by a National Research Council committee sheds light on the National Wild Horses and Burros Program.
Nov 19, 2013
B: Correct! Garrott and Oli—authors of the Science article—suggest that if the wild horse population could be brought down to 23,000, contraceptives plus adoptions could keep numbers at a sustainable level indefinitely.