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    Could Dyson spheres exist in our galaxy?

    05:08
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    05:15
  • World's smallest pacemaker gives new hope to babies with heart defects

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  • Stunning display of Northern Lights seen around the world

    01:16
  • Severe solar storm will bring beauty in the sky and potential disruptions

    01:27
  • NASA scrubs Boeing’s Starliner launch

    03:23
  • See Kate the Chemist make a rain cloud in a jar in Studio 1A!

    05:38
  • Worsening allergies tied to climate change and severe weather

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  • Coral scientists explain how coral bleaching happens

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  • 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

Why is Tonight's Supermoon so Super?

01:40

The moon will be closer to the Earth tonight than it has at anytime this century. The next time it will be this close will be in 18 years.