Investigate the appearance of a strange white dome over a valley that's famous for UFO sightings and learn why square waves in the sea spell danger. Then work with engineers to see if weather caused a sudden bridge collapse on a clear, blue-sky day.

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Si vous aimez cette émission, vous aimerez sûrement celles-ci :

• Across the Fence
• Channel 3 News at 5:30
• NBC Nightly News Kids Edition