Bring in some excerpts. I curious why no one will bring in any excerpts. Are they worried about it being scrutinized.
If you believe the last, then call our bluff. Scrutinise the book. Tear it apart.
Here is an excerpt:
http://www.harpercollins.com/books/9780007162208/Big_Bang/excerpt.aspx
The first part of the chapter discusses many creation myths and explains why a scientific theory is different to such myths.
From page 9:
"Every genuine scientific theory must make a prediction about the universe that can be observed or measured."
Singh then goes on to explain how
Eratosthenes measure the circumference of the Earth -- though he modernises some of the maths. Depending on whether Eratosthenes meant the Olympic stade or the Egyptian stade, he was accurate to 15% or 2% (Eratosthenes worked in Alexandria, Egypt).
After that comes the size of the moon and the sun and their distance from the Earth. Philosophers had already worked out how to measure that, they only lacked the size of the Earth. Singh explains how.
On the assumption that the sun is a long way away, the size of the Earth's shadow is much the same as the size of the Earth. From the time the first edge of the moon crosses into the Earth's shadow during a lunar eclipse, to the time the opposite edge of the moon crosses into the same shadow: 50 minutes.
Time for the first edge of the moon to cross from one side of the Earth's shadow to the other: 200 minutes. This implies that the Earth is about 4 times as wide as the moon. (Assuming constant speed)
Distance to the moon?
The method is based on similar triangles.
That takes us to page 15, the first chapter ending on page 80. The diagrams will help understand.
Alternatively, use google. Or ask questions in the science forum.