How CRISPR lets you edit DNA

From the smallest single-celled organism to the largest creatures on Earth, every living thing is defined by its genes. With recent advancements, scientists can change an organism's fundamental features in record time using gene editing tools such as CRISPR. But where did this medical marvel come from and how does it work? Andrea M. Henle examines the science behind this new technology. [Directed by Adam Wells, narrated by Susan Zimmerman, music by Chris Reed].