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How do viruses work? Sort of like an alien invasion that replaces our cell’s genetic code.

In this episode, we delve into the difficulties of resurrecting extinct animals.

How DNA's mysterious instructions buried in a gene become the actual nose on a face.

If you're curious about the origin of boys, look no further than the Y chromosome.

See what happens if DNA code gets deleted, put in the wrong place, or switched.

What causes cancer and ways to calm down those "good genes that have gone bad."

See how scientists are expanding the DNA alphabet & what to look for in the search for E.T

Take a peek into the body's war room during the heat of battle with cancer.

Nancy Wexler reveals that she has inherited the disease she has spent her life studying.

The Central Park Five talk about what the film means to them.

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