From the frozen tundra of Siberia to the cutting-edge genetics labs of Harvard University, a group of young scientists--under the guidance of Dr. George Church, the most brilliant geneticist of our time--is working to make the impossible happen. Their task? To bring the Woolly Mammoth, a creature that has been extinct for three thousand years, back into our world. How will they do it? By sequencing the DNA of a frozen Woolly Mammoth harvested from above the Arctic Circle, and then splicing elements of it into the DNA of a modern elephant. Through this process, they hope to turn the hybrid cells into a functional embryo and bring the extinct creatures to life in our modern world.