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Blimp vs. Zeppelin: What's the Difference?

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The Dilemma: You're at a football game and there's a large, cigar-shaped object hovering suspiciously close to you. Question: Is it a blimp or a zeppelin? And more important, why didn't you get better seats?

People You Can Impress: whoever's perched next to you in the nosebleeds.

The Quick Trick: When in doubt, just think of Led Zeppelin. Zeppelins are heavy metal—or at least they've got metal skeletons. Blimps, on the other hand, aren't.

The Explanation: Both blimps and zeppelins work by being lighter than air—they're filled with a gas that's lighter than oxygen, so they go up like hot-air balloons. But balloons can't be steered. Realizing this, German Count (Graf) Ferdinand von Zeppelin decided he wanted to devise a "dirigible [or steerable] balloon" in the 1890s for use in military reconnaissance work. Eventually, these dirigible balloons took the generic name zeppelin and were used as bombers or scout craft through World War I. This was just one of their many uses, however. The airships doubled as a major mode of transportation between the wars, routinely making transatlantic flights, and the enormous Graf Zeppelin even circumnavigated the globe in 1929.

So just how popular were these zeppelins? Well, enough that the spire on the top of the Empire State Building was designed as a docking mast for them, although that idea proved impractical due to the serious updrafts (and besides, who wants to disembark while dangling 1,300 feet over Manhattan?).

Incidentally, anyone who's seen the footage of the Hindenburg incinerating at Lakehurst, N.J., in 1937 can see evidence of the main difference between zeppelins and blimps: zeppelins have rigid metal skeletons, making them suitable for longer trips in a wider variety of weather conditions (which also makes them expensive). Blimps, on the other hand, are simply shaped balloons with fins and an engine. Oh, and as for the name "blimp"? It dates back to 1916 and mimics the sound made when the balloon is thumped with a finger.

Led and Other Zeppelins
Led Zeppelin is to date the greatest band ever named after a flying machine (take that, Jefferson Airplane). The band's name is completely attributable to Keith Moon, the late and eccentric drummer of The Who. The pessimistic Moon thought the band, originally called the New Yardbirds, would "go over like a lead zeppelin." But the plucky young band reveled in the challenge and quickly adopted the name—with a minor change in spelling.

Excerpted from What's the Difference?, which is available in our store.

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Animals
Fisherman Catches Rare Blue Lobster, Donates It to Science
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FRED TANNEAU/AFP/Getty Images

Live lobsters caught off the New England coast are typically brown, olive-green, or gray—which is why one New Hampshire fisherman was stunned when he snagged a blue one in mid-July.

As The Independent reports, Greg Ward, from Rye, New Hampshire, discovered the unusual lobster while examining his catch near the New Hampshire-Maine border. Ward initially thought the pale crustacean was an albino lobster, which some experts estimate to be a one-in-100-million discovery. However, a closer inspection revealed that the lobster's hard shell was blue and cream.

"This one was not all the way white and not all the way blue," Ward told The Portsmouth Herald. "I've never seen anything like it."

While not as rare as an albino lobster, blue lobsters are still a famously elusive catch: It's said that the odds of their occurrence are an estimated one in two million, although nobody knows the exact numbers.

Instead of eating the blue lobster, Ward decided to donate it to the Seacoast Science Center in Rye. There, it will be studied and displayed in a lobster tank with other unusually colored critters, including a second blue lobster, a bright orange lobster, and a calico-spotted lobster.

[h/t The Telegraph]

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Animals
Australian Scientists Discover First New Species of Sunfish in 125 Years
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Courtesy Murdoch University

Scientists have pinpointed a whole new species of the largest bony fish in the world, the massive sunfish, as we learned from Smithsonian magazine. It's the first new species of sunfish proposed in more than 125 years.

As the researchers report in the Zoological Journal of the Linnean Society, the genetic differences between the newly named hoodwinker sunfish (Mola tecta) and its other sunfish brethren was confirmed by data on 27 different samples of the species collected over the course of three years. Since sunfish are so massive—the biggest can weigh as much as 5000 pounds—they pose a challenge to preserve and store, even for museums with large research collections. Lead author Marianne Nyegaard of Murdoch University in Australia traveled thousands of miles to find and collected genetic data on sunfish stranded on beaches. At one point, she was asked if she would be bringing her own crane to collect one.

Nyegaard also went back through scientific literature dating back to the 1500s, sorting through descriptions of sea monsters and mermen to see if any of the documentation sounded like observations of the hoodwinker. "We retraced the steps of early naturalists and taxonomists to understand how such a large fish could have evaded discovery all this time," she said in a press statement. "Overall, we felt science had been repeatedly tricked by this cheeky species, which is why we named it the 'hoodwinker.'"

Japanese researchers first detected genetic differences between previously known sunfish and a new, unknown species 10 years ago, and this confirms the existence of a whole different type from species like the Mola mola or Mola ramsayi.

Mola tecta looks a little different from other sunfish, with a more slender body. As it grows, it doesn't develop the protruding snout or bumps that other sunfish exhibit. Similarly to the others, though, it can reach a length of 8 feet or more. 

Based on the stomach contents of some of the specimens studied, the hoodwinker likely feeds on salps, a jellyfish-like creature that it probably chomps on (yes, sunfish have teeth) during deep dives. The species has been found near New Zealand, Australia, South Africa, and southern Chile.

[h/t Smithsonian]

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