Young-Earth creationists (YECs) believe that God created the Earth and all life on it in six 24-hour days, exactly as described in Genesis, and that the universe (and by extension the Earth) is less than 10,000 years old. There is quite an amount of contradictions that this claim has with history and science.
Scientific difficulties with Young Earth Creationism
Speed of Light
One problem with Young Earth Creationism is with light. Supposedly, the Earth is 10,000 years old. Since light travels in light years, we would only be able to see stars that are less than 10,000 light years away. The Great Andromeda Galaxy is 2 million light years away. Other galaxies are even further away. Some scientists have even saw some stars about 13 billion light years away from the Earth. If the universe was only 10,000 years old, the light from these objects would not be able to be seen by telescopes.
Universe Formation Problem
Models of the Big Bang show that it happened about 13.7 billion years ago. This is, by far, much older than what creationists say. The evidence about this is all on the Big Bang side.
Age of Earth
One topic that comes up frequently is the Age of Earth. Young-Earth creationists believe that Earth is about 6,000 years old. This contrasts with radiometric dating of the Earth, which puts her age at 4.6 billion years. Rocks from space also have been dated around 4.6 billion years. Geologists also track changes in the Earth happening over millions of years, such as plate tectonics and mountain building.
Other Scientific Difficulties
- Fossil remains and artifacts in the Americas show that humanity migrated to the Americas thousands of years before Young-Earth creationists believe when the Earth was created. Does the biblical textual evidence outweigh physical evidence?