As the cost of fuel remains high, studies estimate that Americans are now spending on average 3.3% percent of the paycheck on gas. That's nearly two thousand dollars a year! But before you have to decide between selling off your first child and gassing up your car, try your hand at making your own fuel, homemade biodiesel. Made from restaurants' used vegetable oil and a few other easily-obtained ingredients, homemade biodiesel can cost less than a dollar per gallon to produce and is more environmentally-friendly than both regular diesel fuel and gasoline.

Stem cells were first isolated by scientists at the University of Wisconsin and Johns Hopkins University on 5 November 1998. In less than a decade, we hear about them everywhere – on television, in the newspaper and even in presidential elections. However, what exactly are stem cells and why are they causing so much hype?