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Alexandrina da Costa was a Portuguese mystic who, from the 1920s until her death in 1955, suffered paralysis and chronic pain. She also reportedly had visions of Jesus and Mary, and was tormented viciously by Satan. Were her encounters real?

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The mysterious caves in Ecuador’s Amazon Rainforest hold everything from golden statues, to metallic books, to architecture that can only be described as otherworldly… if you believe the Swiss author who wrote about them in his hugely popular 1970s book.

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Here one moment, gone the next. Is it possible to blip into another location at the snap of a finger? There are stories that date back hundreds of years of people doing just that. And now, scientists are engaging the question on a quantum level.

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As other ships in the area reestablished contact with the mainland, the Andrea Gail remained silent. Hours turned into days, and it became clear that the crew didn’t survive the brutal Nor’easter. What wasn’t clear was why not. What happened to their emergency beacon? How did the vessel go down? And what’s going on with the supernatural stories surrounding its lost crew?

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In late October 1991, the crew of a commercial swordfishing vessel sailed through the collision of three separate storms — a “perfect storm” that ravaged Canada’s Grand Banks with 70 ft. waves and 90 mph winds.

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After years of research, Dr. Maria Reiche formed one mainstream idea about how and why the Nazca Lines were made. But who were they made for? In the 1960s, Swiss author Erich Von Daniken proposed a theory: that aliens visited our ancestors and imparted onto them the knowledge needed to create our greatest earthly treasures. Most experts ignored these claims. Others believed he was on to something...

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Discovered in the early 20th century, the Nazca Lines are a group of vast, mysterious formations in Peru’s Nazca Desert. For years, archaeologist Maria Reiche researched the origins of these geoglyphs, ultimately determining how and why they were built. But who were they a message for?

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The spree continues into Christmas Day and beyond, during which the teen gang murders their third, fourth, fifth and sixth victims. After a tip, police catch the group wearing victims’ clothing, driving a victim’s stolen car, and in possession of the guns they used in their murders. A Parcast holiday special from Serial Killers.

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In the early hours of Christmas Eve 1992, a senseless murder in Dayton, Ohio, marks the beginning of a rampage. What started as a desire for Christmas cash turns into a three-day killing spree that leaves six people dead. Even more shocking was that the brazen killers were just teens. A Parcast holiday special from Serial Killers.

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Every day, we’re seeing advancements in artificial intelligence with the potential to radically change lives. Question is, will they change for the better — or worse? Will machines be our saviors after the dawn of the Singularity? Or will sentient A.I. tip us toward an apocalypse of our own making? 

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