SciShow
Dark Matter
Dark matter accounts for 23 percent of the known universe, yet scientists don't know what it is. No one can see it, but everyone knows it is there based on the weight of the universe. Even though it isn't invisible, it does have an...
SciShow Kids
What Do Astronauts Do?
Discover why astronauts go to space and what they do there with an entertaining video equipped with captivating graphics and an energetic host.
SciShow
Dark Energy
Dark energy makes up more than 70 percent of the energy in the universe, yet scientists can't really explain it. Video attempts to explain what dark energy is and why we can't answer that question. It offers multiple theories and...
SciShow
Great Minds: Henrietta Leavitt and the Human Computers
For most people, it would seem impossible to make breakthroughs in astronomy when you aren't allowed to use a telescope, but Henrietta Leavitt did just that. She discovered a formula for determining the distance to stars that are...