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    Strand of Beethoven’s hair offers clues into the composer’s death

    01:39
  • James Webb Space Telescope images shatter understanding of age of the universe

    07:42
  • Paleontologists unearth seven million-year-old sperm whale skull in Peru

    00:42
  • Scientists use new A.I. tech to fight diseases

    04:32
  • Congressional Space Medal of Honor recipients Bob Behnken and Doug Hurley: extended interview (Part 1)

    02:58
  • Yale researchers develop turtle-like robot

    01:16
  • What is nuclear fusion and why is it important?

    01:47
  • Filmmaker talks being selected for 1st civilian trip to moon

    04:20
  • Scientists produce nuclear fusion breakthrough

    01:30
  • Fusion energy breakthrough could be an ‘inflection point’ for clean fuel technology

    05:54
  • Orion returns to Earth after 4 weeks in space

    03:02
  • How scientists are using the ocean’s power to fight climate change

    04:47
  • Neil deGrasse Tyson talks new book, shares future predictions

    05:13
  • New Alzheimer’s drug could signal potential treatment breakthrough

    01:18
  • Mauna Loa, world's largest volcano, erupts for first time in nearly 40 years

    00:20
  • Artemis I mission launches to the moon

    04:13
  • Researchers say they are close to reversing aging

    06:57
  • Blood Moon makes an appearance on election day for the first time

    01:22
  • SpaceX launches Falcon Heavy rocket on Space Force mission

    01:43
  • Plagued by mosquito bites? New research suggests why, with public health implications

    01:42

Volcano in Mexico has towns on alert

00:33

Activity at Popocatepetl volcano in Mexico increased over the weekend. NBCNews.com's Dara Brown reports.