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![NOVA scienceNOW: 1918 Flu](/wgbh/nova/images03/ticon_3318_02_nsn.jpg) | NOVA scienceNOW: 1918 Flu A virus that killed up to 50 million people is brought back to life to decipher its deadliness. |
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![Boldest Hoax, The](/wgbh/nova/images03/ticon_3202_hoax.jpg) | Boldest Hoax, The Who perpetrated Piltdown Man, the greatest scientific fraud of the 20th century? |
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![Bombing of America](/wgbh/nova/images03/ticon_2310_bombing.jpg) | Bombing of America Forensic scientists search for clues hidden within the chaos of crime scenes to help law enforcement find the Unabomber. |
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![Brain Eater, The](/wgbh/nova/images03/ticon_2505_madcow.jpg) | Brain Eater, The Scientists scramble to understand the devastating ailment known as mad cow disease. |
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![Building on Ground Zero](/wgbh/nova/images03/ticon_3311_wtc.jpg) | Building on Ground Zero Can lessons learned from the Twin Towers' collapse make new buildings safer? |
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![Crash of Flight 111](/wgbh/nova/images03/ticon_3105_aircrash.jpg) | Crash of Flight 111 One of the most exhaustive investigations in aviation history reveals telling clues to the cause of a disaster off Nova Scotia. |
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![Curse of T. rex](/wgbh/nova/images03/ticon_2408_trex.jpg) | Curse of T. rex How do paleontologists and commercial fossil hunters know where to look for rare and priceless dinosaur bones? |
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![Deep Sea Invasion](/wgbh/nova/images03/ticon_3008_algae.jpg) | Deep Sea Invasion A toxic aquarium plant is accidentally released into the Mediterranean, overwhelming marine life and threatening to spread worldwide. |
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![Diamond Deception](/wgbh/nova/images03/ticon_2703_diamond.jpg) | Diamond Deception Makeshift labs in China and Russia are turning out synthetic gemstones that rival natural diamonds. |
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![Great Inca Rebellion, The](/wgbh/nova/images03/ticon_3409_inca.jpg) | Great Inca Rebellion, The Mass graves and forensic evidence reveal a complex truth about how the Inca Empire fell. |
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![Hitler's Lost Sub](/wgbh/nova/images03/ticon_2712_lostsub.jpg) | Hitler's Lost Sub A fisherman's net snags off the coast of New Jersey, revealing a missing World War II German U-boat. |
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![Hitler's Sunken Secret](/wgbh/nova/images03/ticon_3216_hydro.jpg) | Hitler's Sunken Secret An expedition to the bottom of Norway's Lake Tinn illuminates Nazi Germany's nuclear ambitions. |
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![Holocaust on Trial](/wgbh/nova/images03/ticon_2711_holocaus.jpg) | Holocaust on Trial A trial in London's High Court examines evidence from Auschwitz to successfully challenge the claims of Holocaust "deniers." |
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![Hunt for the Supertwister](/wgbh/nova/images03/ticon_3107_tornado.jpg) | Hunt for the Supertwister Tornado-chasing scientists with an eye to better forecasting risk their lives to plumb the secrets of nature's most terrifying killer. |
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![Kidnapped by UFOs?](/wgbh/nova/images03/ticon_2306_aliens.jpg) | Kidnapped by UFOs? Carl Sagan and other scientists investigate claims that people have been visited or abducted by aliens. |
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![Killer's Trail, The](/wgbh/nova/images03/ticon_2613_sheppard.jpg) | Killer's Trail, The Forensic scientists revisit the infamous Sheppard murder case of the 1950s in search of the true killer. |
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![Last Flight of Bomber 31](/wgbh/nova/images03/ticon_3002_bomber.jpg) | Last Flight of Bomber 31 Forensic scientists set out to discover what happened to seven American airmen whose plane crashed in Kamchatka during World War II. |
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![Missing in MiG Alley](/wgbh/nova/images03/ticon_3418_warplane.jpg) | Missing in MiG Alley What happened to American pilots shot down over Korea half a century ago? |
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![NOVA scienceNOW: Little People of Flores](/wgbh/nova/images03/ticon_3209_01_nsn.jpg) | NOVA scienceNOW: Little People of Flores The remains of three-foot-tall humans are discovered on a remote Indonesian island. |
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![Mummy Who Would be King, The](/wgbh/nova/images03/ticon_3301_mummy.jpg) | Mummy Who Would be King, The Could a mummy exhibited for 140 years at an obscure museum in Niagara Falls be the remains of a long-lost Egyptian pharaoh? |
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![Most Dangerous Woman in America, The](/wgbh/nova/images03/ticon_3115_typhoid.jpg) | Most Dangerous Woman in America, The Examine the complex case of Typhoid Mary, a cook who was quarantined for life against her will in the early 1900s. |
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![Mystery of the First Americans](/wgbh/nova/images03/ticon_2705_first.jpg) | Mystery of the First Americans The discovery of a 9,000-year-old skeleton embroils scientists in a debate over North America's first inhabitants. |
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![Perfect Corpse, The](/wgbh/nova/images03/ticon_3304_bog.jpg) | Perfect Corpse, The Forensic investigators tease secrets from the well-preserved bodies of people buried long ago in peat bogs. |
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![NOVA scienceNOW: Profile: Julie Schablitsky](/wgbh/nova/images03/ticon_3410_04_nsn.jpg) | NOVA scienceNOW: Profile: Julie Schablitsky Meet an archeologist who is helping to rewrite the history of the Old West. |
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![Secrets of Making Money](/wgbh/nova/images03/ticon_2314_moolah.jpg) | Secrets of Making Money With a radically redesigned bill, the U.S. Treasury fights back against a new breed of counterfeiters. |
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![Viking Deception, The](/wgbh/nova/images03/ticon_3205_vinland.jpg) | Viking Deception, The Is the Vinland Map a priceless depiction of the New World made before Columbus's voyage or a 20th-century fake? |
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![Vanished!](/wgbh/nova/images03/ticon_2802_vanished.jpg) | Vanished! The mysterious 1947 disappearance of an airplane high in the Andes en route from Argentina to Chile is finally resolved. |
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![Why the Towers Fell](/wgbh/nova/images03/ticon_2907_wtc.jpg) | Why the Towers Fell Forensic engineers investigate the collapse of the World Trade Center. |
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