The book speaks about Vredefort crater as one of the biggest impact sites in the world. That remains a reality and in fact, that is how it is presented in the book as well. It was named after the Vredefort town which is located at its center. The physical location of the crater is in South Africa.
Vredefort Dome at the center of the crater is added to the UNESCO World Heritage Sites. For a long time, the crater formation was attributed to an extreme volcanic eruption in the past which was later negated by the impact geological structures seen around the site.
The size of the crater indicates that the impact would have released a huge amount of energy to carve out such a structure. The asteroid itself could have 5-10 km in diameter. Not only this but also the fact that the impact would have happened, at least, 2.02 billion years ago. That makes it the second oldest impact sites in the world.
Hope you enjoyed reading about the Vredefort Crater!
Facts: Vredefort crater is a real life impact site in South Africa.
Concept seen in: Spirit Raiders, a science fiction novel
Where can I read sample chapters? https://www.smashwords.com/books/view/573762
Where can I check print version? https://www.createspace.com/5537237
Where can I see book trailer? https://www.youtube.com/watch?v=A7YqZzqVNv4
Truth-o-meter stands for the truth in the concept, ideas or scenarios in the book. So, *zero stands for a made up fictional concept while one stands for actual reality.