How Far Can We Go? Limits of Humanity (Old Version – Watch the New One)

Important Vocabulary Words From The Video


A supercluster is a group of galaxies that are very large and organized. They are usually found near the centers of large galaxies.

  • There are superclusters of galaxies near the center of the galaxy.
  • The superclusters are located in the center of the galaxy.

The billionth is a number that is very large. It's equal to 1,000,000,000. This number is so large that it's impossible to say it with words.

  • The billionth baby was born this week.

To annihilate something is to completely destroy it. You might annihilate a group of enemies or a whole city.

  • He annihilated the entire city in just one day.
  • The enemy forces were annihilated by the army.

Denser means thicker. When you describe something as denser, you are saying that it is more concentrated or thicker than usual.

  • The solution was more dense than water.
  • The soup was denser than usual, because it was made with barley.

The subatomic level is the smallest level of the universe that we can see or measure. At the subatomic level, particles like atoms are still moving around.

  • The subatomic particles were moving so quickly that they couldn't be seen.

A thing is gravitational if it attracts other things towards it. The Earth is gravitational, because it attracts objects towards it.

  • The gravitational force between the planets is what keeps them in orbit.
  • The gravitational force between the stars is what makes them move.

Unoriginal means that something is not very creative or innovative. Sometimes people use the word to describe something that is not very good or enjoyable.

  • The movie was unoriginal and boring.
  • The book was unoriginal and didn't have any surprises.

To recede is to move back, to gradually move away from something. When the tide recedes, the water gradually moves away from the shore.

  • The receding tide left behind a wide swath of sand.
  • The receding tide left the ship behind.