IE 11 is not supported. For an optimal experience visit our site on another browser.
  • UP NEXT

    Rover sends back new images from moon mission

    03:35
  • Excitement builds for April's rare total solar eclipse: How to catch it

    02:43
  • Climate change threatens winter traditions amid record-breaking temperatures

    02:00
  • Dr. Arno Penzias, who helped confirm Big Bang Theory, dies at 90

    02:01
  • Doomsday Clock stays at 90 seconds to midnight for second straight year

    01:59
  • Scientists raise alarms about controversial bite marks analysis used in convictions

    03:00
  • Meet the students using radio waves to contact the ISS

    05:57
  • NASA straps dreams of 2024 moon mission to SpaceX rockets

    02:47
  • Brain implant uses AI to give speech-disabled patients a voice

    04:31
  • NASA shares stunning photos of 'Christmas Tree Cluster' in space

    00:38
  • NASA beams cat video from deep space back to Earth using laser

    04:07
  • See images of exploding star captured by NASA’s Webb telescope

    00:31
  • Growing number of misleading ads using AI to create fake celebrity endorsements

    02:30
  • Mary Cleave, pioneering NASA astronaut, dies at 76

    02:10
  • SpaceX's Starship lifts off successfully but ends in a lost signal

    01:20
  • Biden awards medals in science and technology innovation

    00:53
  • NASA’s Psyche mission launches to explore metal-filled asteroid

    01:02
  • Three scientists win the Nobel Prize in chemistry for their work on quantum dots

    00:52
  • Nobel Prize in medicine awarded to 2 scientists whose discoveries enabled the creation of mRNA vaccines against Covid-19

    01:24
  • Former U.N. climate chief: Exclude fossil fuel firms from climate talks

    02:24

What is nuclear fusion and why is it important?

01:47

Scientists announced that they have successfully created a nuclear fusion reaction which researchers have been attempting to do for decades. NBC News’ Hallie Jackson breaks down how this new technology could replace the way energy is made and potentially move away from the current usage of fossil fuels.