Free Republic

The brown rat (Rattus norvegicus) is one of the most ubiquitous and familiar creatures on the planet — but also perhaps one of the least understood. According to Kaylee Byers, one of the lead researchers with the Vancouver Rat Project, "In some ways, we know more about life on Mars than how rats navigate life on Earth." "Rats have long been associated with filth, disease and death," said Bobby Corrigan, a world-renowned rodentologist and New York City's unofficial "rat czar."

A snake eating its own tail has been a symbol of infinity since ancient times. But seeing an illustration of this concept is nothing like witnessing the real-life horror. On rare occasions, mostly cataloged in captivity, a snake really can swallow its own tail. As the reptile guzzles back more and more of its body, the emblem of eternity quickly becomes a spiral of death. If the snake's owner does not intervene, its digestive fluids may start breaking down its own body. Some captive snakes that make a habit of eating themselves show damage on their scales from their acidic...