166 Search Results

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  National Geographic: Black Holes

  03:11

  Astronomy

  black holes

  E

  At the center of our galaxy, a supermassive black hole churns. Learn about the types of black holes, how they form, and how scientists discovered these invisible, yet extraordinary objects in our universe.

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  National Geographic: Electromagnetism

  03:20

  Physics

  electromagnetism

  E

  Electromagnetism is one of the four fundamental forces of nature. Learn about the relationship between electricity and magnetism, the different wavelengths on the electromagnetic spectrum, and how an invisible force protects our entire planet.

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  National Geographic: The Flu

  03:26

  Personal Health

  health education

  microbiology

  influenza

  viruses

  flu

  E

  The influenza virus is an recurring nightmare, killing thousands of people each year. Learn how the virus attacks its host, why it's nearly impossible to eradicate, and what scientists are doing to combat it.

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  National Geographic: Genetics Overview

  03:13

  Biology

  Genetics

  genomes

  MS HS

  What is a genome, and how are traits passed from generation to generation? Learn how pea plants helped launch the study of genetics and how the field of genetics research has evolved over time.

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  National Geographic: The Universe

  05:50

  Astronomy

  the universe

  MS HS

  How old is the universe, and how did it begin? Throughout history, countless myths and scientific theories have tried to explain the universe's origins. The most widely accepted explanation is the big bang theory. Learn about the explosion that started it all and how the universe grew from the size of an atom to encompass everything in existence today.

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  National Geographic: What is a Solstice?

  02:02

  Astronomy

  solstice

  E

  What is the definition of a solstice, and when do they happen? Is the winter solstice always the first day of winter? Find out what causes these bi-annual astronomical events, as well as how they bring about the shortest and longest days of the year.

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  National Geographic: Gravitational Waves

  01:49

  Physics

  general relativity

  gravitational waves

  HS C

  What are gravitational waves and how are they detected? These ripples in space-time, sometimes caused by neutron stars colliding, were recently recorded in the groundbreaking LIGO-Virgo observation.

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  National Geographic: What is Renewable Energy?

  03:17

  Science

  alternative energy

  energy

  E MS HS

  There are many benefits to using renewable energy resources, but what is it exactly? From solar to wind, find out more about alternative energy, the fastest-growing source of energy in the world, and how we can use it to combat climate change.

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  National Geographic: What is Nuclear Energy?

  02:28

  Chemistry

  energy

  nuclear energy

  nuclear chemistry

  nuclear fission

  nuclear fusion

  E MS HS C

  How does nuclear energy work? Is radiation a risk? Find out the difference between nuclear fission and fusion, how uranium fuels the process, and the pros and cons of this alternative energy source.

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  National Geographic: Solar Eclipses

  04:58

  Astronomy

  eclipse

  types of eclipses

  MS HS

  A total solar eclipse happens somewhere on Earth once every year or two. What is an eclipse? Learn more about how solar eclipses happen, the four types of eclipses, and how to view the sun safely if you're within the path of totality.