After the discovery of hormones in the early 20th century, new methods of pregnancy testing were developed. Some of these involved animal use, but how did the rabbit test work, and when did it get replaced?
Why did lions in the Tsavo region start to attack humans in the first place? Modern behavioral and scientific research has given us some surprising insights into the causes of the 1898 attacks as well as modern lion attacks in the same area.
In 1898, two male lions killed and ate dozens of people in Tsavo and shut down construction of the Uganda Railroad. Lt. Col. John H. Patterson, a civil engineer working on the project, made it his personal mission to stop the feline scourge.
History is full of astonishing stories, and not all of them revolve around humans. In the first part of this two-part series, Katie and Sarah cover five of history's most memorable animals. Listen in to learn more about historical animals.
Although prehistoric societies hunted horses for food, they quickly realized the animals were more useful as a means of transportation. Tune in as Katie and Sarah explore one of the most specialized types of horses -- battle steeds -- throughout history.
From the average Joe to the president of the United States, people across the world have pet dogs. Get the details on the canine companions of history's most influential personalities in this podcast from HowStuffWorks.com.