The Perfect Pearl
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Sinopsis
The pearl—the only gem produced by a living animal—has long carried a certain allure. Yet the best mollusk for making this gem—the pearl oyster—doesn't always produce a pearl, and even then, the pearls are rarely perfectly round. It wasn't until the late nineteenth century, when a Japanese scientist discovered a technique to incite oysters to produce these gems, that an industry was formed. Inducing an oyster to create a pearl is only half the battle—the oyster then needs a nutrient-rich, open environment in which to grow. This NOVA program looks at the science of pearl farming, follows efforts of oyster farmers trying to cope with growing problems of pollution and overcrowding, and considers the shifting sands of dominance within the pearl industry.
S26E01
55 min
Lost at Sea: The Search for Longitude
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S26E02
55 min
Chasing El Nino
13 oct. 1998
S26E03
55 min
Terror In Space
27 oct. 1998
S26E04
55 min
Special Effects: Titanic and Beyond
3 nov. 1998
S26E05
55 min
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10 nov. 1998
S26E06
55 min
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24 nov. 1998
S26E07
55 min
Ice Mummies: Siberian Ice Maiden (2)
24 nov. 1998
S26E08
55 min
Ice Mummies: Return of the Iceman (3)
24 nov. 1998
S26E09
55 min
Leopards of the Night with David Attenborough
1 dic. 1998
S26E10
55 min
The Perfect Pearl
29 dic. 1998
S26E11
55 min
The Beast of Loch Ness
12 ene. 1999
S26E12
55 min
Submarines, Secrets, and Spies
19 ene. 1999
S26E13
55 min
Everest: The Mystery of Mallory and Irvin
6 oct. 1999
S26E14
55 min
Escape! Because Accidents Happen: Fire (1)
16 feb. 1999
S26E15
55 min
Escape! Because Accidents Happen: Car Crash (2)
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S26E16
55 min
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17 feb. 1999
S26E17
55 min
Escape! Because Accidents Happen: Abandon Ship (4)
17 feb. 1999
S26E18
55 min
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23 feb. 1999
S26E19
55 min
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30 mar. 1999
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