Cross section of chambered nautilus -- Josh Westrich/Corbis

Cross section of chambered nautilus -- Josh Westrich/Corbis

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• The mollusk who calls this shell home lives in only the outermost chamber, using the rest as ballast.""Think of it as nature\s perfect submarine
• An inspiration to poets and a puzzle to scientists, this creature is an expert remodeler, building perfect chambers slightly larger than the last as it ages and grows.""The senior-citizen discounts kick in by the time you\ve got 30
• What do nautilus shells have in common with sunflowers, corn kernels, beehives, pinecones, and pineapples?""Nature\s magic algorithm
• When you have curves this graceful…""You\re bound to attract imitators

Orphaned orangutans at Sepilok Reserve, Borneo -- Frans Lanting/Corbis

Orphaned orangutans at Sepilok Reserve, Borneo -- Frans Lanting/Corbis

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• The United Nations set aside this day to go to a ballgame, get your nails done, take a bike ride, perhaps do some shopping…""But not solo
• These pals have lost their parents, but they\ve gained lots of friends in a sanctuary for orphaned orangutans.""It\s on the world\s third-largest island, in an area called “the land below the wind”
• Close the door if you don\t want others to hear you say “awww” and “cuuute.”""Warning: Heartstring-tugging videos ahead…
• See something familiar in those eyes? Some say there\s a reason why these guys are called…""“Men of the forest”

Tahiti, French Polynesia -- Larry Dunmire/SuperStock

Tahiti, French Polynesia -- Larry Dunmire/SuperStock

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• Women were often the subject of this artist.""He lived in Tahiti and created his most famous works there
• Where does the black pearl lie?""Obviously in Tahiti – black pearl is one of the major exports of the island
• Prince Edward Island is home to red sand beaches. Here, they have a beach of a different color.""This sand is found near volcanoes and contains fragments of lava
• Tahiti is the largest island in the French Polynesia and was formed by three volcanoes""It has two round formations connected by an “isthmus” – a narrow strip of land connecting two larger areas.

Skyscrapers in Houston, Texas -- Didier Dorval/Masterfile

Skyscrapers in Houston, Texas -- Didier Dorval/Masterfile

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• Most people know the three biggest cities in the U.S. (pause here while you quickly name them). But what\s the fourth-largest?""If you were standing right here, you\d be in it
• Travel just down the road to visit the place that\s always dreaded the memorable phrase…""‘Houston, we have a problem\
• During the brutally hot summers here, sometimes you just want to take a pleasant stroll…""Completely underground
• Even though it\s miles and miles inland, this seemingly landlocked city has a port, the second-biggest in the country.""Maybe it\ll all make sense if you look at it this way

Double rainbow over Eilean Donan Castle, Dornie, Scotland -- SIME / eStock Photo

Double rainbow over Eilean Donan Castle, Dornie, Scotland -- SIME / eStock Photo

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• Think of a stone castle in Scotland and you\ll think of this place.""Eilean Donan castle is one of the most photographed Scottish monuments in films
• It\s not Loch Long or Loch Alsh...""Check out this sea loch situated on the western coast of Scotland
• It must be nice to have a house all to yourself… it\s a castle!""The island Eilean Donan officially has a population of one as of 2001. See what he sees everyday.
• Whoa, my god, double rainbow all the way across the sky!""Watch the 2010 viral video phenomenon

Donkey looking over an ancient rock wall in Ireland -- Ryan Donnell/Corbis

Donkey looking over an ancient rock wall in Ireland -- Ryan Donnell/Corbis

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• Often heard \round these parts is this stirring melody, one of the most popular of the previous century.""Nothing says “the Emerald Isle” like a few bars of this tune
• If you\ve ever sipped a pint of Guinness, hummed a U2 song, quoted Yeats, plucked a four-leaf clover, or pinched someone on St. Patrick\s Day…""You\ll understand why so many are partial to this lovely land
• Over the centuries, the people of this northern island have mastered the art of piling rocks without the use of mortar.""A stroll down many a bonny lane will turn up plenty of these ancient walls
• Humiliating, perhaps…""But for whom?

Sunset of Elliott Bay taken from the Space Needle, Seattle -- Mohammed Kamel

Sunset of Elliott Bay taken from the Space Needle, Seattle -- Mohammed Kamel

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• Gather \round, watch your head, and behold for your pleasure and entertainment…""The aerial artistry of a cold, 10-pound salmon pitched high and tight
• With bikers, baristas, bivalves, and brainiacs, not to mention sunsets like this…""Locals will tell you that life is better here
• To get a view like this, you could rent a helicopter…""Or just take an elevator to the top of this iconic perch
• Frequent ferries, scores of bridges, and an unshakable trust in the concept of buoyancy are required…""In a city surrounded by this much water