““Recent studies funded by Britain’s Natural Environment Research Council provide support for those concerns. (Thomas, et al, 2004; Stevens, et al, 2004) While there have been five mass extinctions in the history of our planet, they are all presumed to have been caused by extraterrestrial events, such as a comet smashing to earth. One of the new studies concludes that the “natural world is experiencing the sixth, major extinction event in its history.” (Lovell 2004) This time though, the cause of the extinction is not extraterrestrial. According to one of the study’s authors, Jeremy Thomas, “As far as we can tell this one is caused by one animal organism—man.””