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Ten-year-old "Sean the Science Kid" shares his passion for the brain with Dr. Sanjay Gupta. Together, they explore brain anatomy, discuss favorite neurochemicals and explain why memories are superpowers. For more of "Chasing Life with Dr. Sanjay Gupta," listen and follow wherever you get your podcasts.

The human body carries one of the most mind-blowing secrets of the universe inside every single cell, DNA. If you took all the DNA from your body and stretched it out end to end, it would reach so far that it could span the distance from Earth to Pluto and back not once but 17 times.

Think about that for a moment. Something so unimaginably tiny, coiled inside the nucleus of your cells, holds a blueprint long enough to travel billions of kilometers across space. This incredible fact shows just how packed with information our DNA truly is. Each strand contains the instructions for life, tightly wound and organized so efficiently that it fits into microscopic cells without us ever noticing.

What’s even more astonishing is how this vast molecular library is responsible for every detail of who we are, our eye color, height, health, and even certain behaviors. The sheer scale of DNA not only reveals the complexity of human biology but also highlights the brilliance of nature’s design.

From the tiniest molecule to cosmic distances, life connects us to the universe in ways we are only beginning to understand. So next time you look up at the night sky, remember, you’re carrying a structure inside you long enough to touch the edge of our solar system and return many times over.