It's been over 150 years since the first article was published about the molecular key to life as we know it — DNA. With help from researcher Pravrutha Raman, Short Wave producer Berly McCoy explains how DNA is stored in our cells and why the iconic double helix shape isn't what you'd see if you peeked inside your cells right now. (encore)Curious about all the other biology that defines us? Email the show at shortwave@npr.org — we're all ears ... and eyes and toes and ... a lot of things. Thanks, DNA!