Support Provided ByLearn More
Planet EarthPlanet Earth

Trapped in Salt

Scientists have discovered water-filled air bubbles trapped in salt crystals that are fully a quarter billion years old. In this audio slide show, biophysicist Jack Griffith describes ancient cellulose fibers and even DNA that he's found within such bubbles using an electron microscope. The material, he claims, is the oldest biological material ever discovered.

ByRachel VanCottNova

National corporate funding for NOVA is provided by Draper. Major funding for NOVA is provided by the David H. Koch Fund for Science, the Corporation for Public Broadcasting, and PBS viewers. Additional funding is provided by the NOVA Science Trust.