With each step, you slide 400,000 years back in time. Where are you? Behind a hardware store in New Jersey -- which also happens to be a massive prehistoric graveyard. The only thing that can save it from turning into an apartment complex is geologist Ken Lacovara and a community effort unlike any attempted before. Hear how this town of 15,000 tapped into a 66-million-year-old murder mystery -- and learn why solving it is so important to our own future on earth. Listen and subscribe to Far Flung with Saleem Reshamwala and more podcasts from the TED Audio Collective wherever you're listening to this.