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  • Killer Subs in Pearl Harbor The stealth attack of Pearl Harbor by Japanese midget submarines is a little-known story of WWII. Airs May 23 at 9pm

  • Missing in MiG Alley What happened to American pilots shot down over Korea half a century ago? Airs May 23 at 10pm

  • NOVA Elements iPad App Explore an interactive periodic table, combine elements to make real stuff, and watch the two-hour NOVA program. Play with the elements.

  • Forgotten Genius Against all odds, African-American chemist Percy Julian became one of the great scientists of the 20th century. Watch now.

  • The Sun Lab Research solar storms using images from NASA telescopes; share your work; and find out about careers in science. Explore the Sun.

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