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    Worsening allergies tied to climate change and severe weather

    02:02
  • Coral scientists explain how coral bleaching happens

    02:15
  • Millions gather to celebrate solar eclipse along path of totality

    03:05
  • Meet the woman who has seen 21 solar eclipses

    02:23
  • Scientists will use total solar eclipse to study the sun's corona

    05:16
  • Teacher makes good on decades-old promise to watch eclipse with former students

    02:57
  • Timelapse videos show darkness of solar eclipse totality

    01:03
  • Special report: Solar eclipse path of totality

    01:44:40
  • Watch emotional moments as skywatchers view solar eclipse

    03:15
  • Gadi Schwartz reports on eclipse totality from plane above Arkansas

    06:04
  • Total eclipse reaches last stop in the U.S. in Maine

    04:11
  • 'So memorable': New Yorkers, tourists gather in midtown Manhattan for partial eclipse viewing

    02:27
  • 'Like a cool summer night': Temperature drops as eclipse hits Cleveland

    04:13
  • Animals active as eclipse reaches totality in Little Rock, Arkansas

    04:18
  • 'Just amazing!': Solar eclipse watchers go wild as the moment of totality passes over Dallas

    03:47
  • NBC’s Morgan Chesky and family witness total eclipse in Kerrville, Texas

    04:31
  • Watch: Solar eclipse reaches totality in Mazatlán, Mexico

    04:15
  • Thousands pack Indianapolis Motor Speedway to view eclipse

    03:48
  • Natural reactions: How animals may behave during the eclipse

    02:43
  • William Shatner discusses the 'magical' moments of a total solar eclipse

    04:16

Mysterious mummies unearth ancient secrets

02:08

Mummies with European features excavated in remote northwestern China and thought to be 4,000 years old may be the earliest known Westerners in Asia. NBC's Robert Kovacik reports on their visit to Orange County, CA.