Explanation: In the 1800'-1950's, people didn't know how to safely perform experiments on humans, so they tested this theory on mice, and they've collected a LOT of information, so ever since then, they've been doing tests on mice, and some humans.
Laurence Yep created a very realistic setting in Dragon wings. He included many accurate details, like early cars, horse-drawn buggies, and crowded streets.
