Many are unaware of it, but aliens are already making their way into our own backyard. They come in droves, sometimes through the air, at times landing on our fields, and other times, invading our waters. They are what scientists call invasive species—foreign plants and animals that have somehow made their way into the country. In some cases, the consequences of these invasions may be disastrous. (Episode on Nov. 10, 2010) Wednesday night after Saksi
