They really like to dissect things on this show...

Last week it was a great white shark...tonight the experts dissect a lion and a tiger. From the outside, the two look very different, but once their skins are removed, even the experts find it hard to tell them apart.Among other experiments, biologists investigate their ability to roar, by delving into the lion's throat to find the voicebox...and makes a discovery that helps explain the way the vocal apparatus works....they also explain what a "liger" is...INSIDE NATURE'S GIANTS: THE BIG CATS...9pm