Building a dinosaur from a chicken | Jack Horner

Important Vocabulary Words From The Video


To conspire is to agree to do something together, to plan to do something together. When two people conspire to commit a crime, they are working together to do something that is not allowed.

  • The two boys were caught conspiring to break into the school.
  • The two women were caught conspiring to cheat on their exams.

Mosquitoes are small, flying insects that live in warm climates. They are known for the diseases that they can spread to humans.

  • The mosquitos are attracted to the smell of sweat.
  • The mosquitos are attracted to the smell of blood.

A medullary is a type of bone that is found in the skull and spine. It's usually white, but can also be colored.

  • The medullary bone is located in the skull.
  • The medullary bone is important because it helps with the development of the brain and spinal cord.

Fossilized means to turn into a fossil. When something is fossilized, it is turned into a hard, mineralized substance.

  • The remains of the dinosaurs were fossilized when the earth built up over them.
  • The remains of the plant were fossilized when the water turned to ice.

Clunky is a word that is used to describe something that is not very smooth or elegant. Clunky things often have a lot of parts that don't fit together very well.

  • The computer is very clunky because the mouse is not very accurate.
  • The shoes are very clunky because they are made out of a material that is not very soft.

Atavism is the retention of features that are typically found in an evolutionary stage that is later in the human species' timeline. This can include features like the ability to walk on all fours, or the possession of teeth that are not typical for humans today.

  • Some people believe that atavism is a sign that the person is connected to the animal kingdom in some way.
  • Atavism is usually seen in animals that are close to the ground, like monkeys or apes.

An archaeopteryx is a type of bird that existed about 150 million years ago. It was a very advanced bird that could fly, and it had feathers.

  • The discovery of the archaeopteryx is a major breakthrough in the understanding of bird evolution.