WASHINGTON (PNN) - March 26, 2015 - The Hindenburg wasn’t brought down by lightning, static, or sabotage. History’s most famous airship was destroyed by helium. Or rather, the lack thereof. The zeppelin’s Nazi builders balked at the price of this rare, lighter-than-air gas. So instead, they filled the blimp with hydrogen, which is much less expensive, just as buoyant, but way more explosive. So no matter what chain of events led up to the explosion, it was helium’s scarcity that killed the airship. Today, the same gas - rare as ever - is putting a major cramp in deep-sea diving operations.

March 24, 2015 - Google is about to make ads on television work just like ads on the Web. Through Google, advertisers will know how many times their ads were viewed. They’ll be able to target audiences based on location and viewing history. In other words, TV advertisers will have access to the same audience intel online advertisers take for granted.

Finally, after all this time, your TV is going to know as much about you as your web browser.

MOUNTAIN VIEW, Kalifornia (PNN) - March 22, 2015 - There are 48,000 Google searches every second. That translates to 3.5 billion per day, and 1.2 trillion per year worldwide. That's twice as many as there were just six years ago. Every six out of 10searches on the Internet are through Google's engine.

LOS ANGELES, Kalifornia (PNN) - March 17, 2015 - Hydrogen powered cars are slowly accelerating in popularity with boosts from infrastructure development and car manufacturers. But getting eco-friendly hydrogen is still a bit of a challenge. Right now, a lot of hydrogen is produced through mixing steam and natural gas. An alternative to using natural gas is electrolysis, using an electric current to pull apart the oxygen and hydrogen in water, but current methods use way too much energy to make it worth it. Scientists around the country are working on making the process simpler, using AAA batteries, chemical reactions and other methods to make hydrogen a greener choice.