The I Ching and it's 64 hexagrams are an ancient Chinese divination system thought to pre-date recorded history.
From Wikipedia:
"The text of the I Ching is a set of oracular statements represented by 64 sets of six lines each called hexagrams (卦 guà). Each hexagram is a figure composed of six stacked horizontal lines (爻 yáo), each line is either Yang (an unbroken, or solid line), or Yin (broken, an open line with a gap in the center). With six such lines stacked from bottom to top there are 2⁶ or 64 possible combinations, and thus 64 hexagrams represented. The solid line represents yang, the creative principle. The open line represents yin, the receptive principle."
Nassim Haramein looked at the 64 hexigrams of the I Ching and analyzed the simple geometry represented by the lines, taking their meaning more as literal geometric information and less as symbolic.
If you want to build the geometry of the structure of the space that is everywhere in the universe on all scales (an infinite tetrahedral array), you begin with the first octave of what becomes an infinite fractal division of the space in a perfectly balance state: a set of 64 tetrahedrons. At 64 tetrahedrons you have what Buckminster Fuller called the "vector equilibrium" also called the cube octahedron (8 tetrahedrons pointing inward) inside a second cube octahedron that is twice as large made of a total of 64 tetrahedrons: an octave.
To get to 64 tetrahedrons you bring together 8 star tetrahedrons. Each star tetrahedron is made from a tetrahedron pointing up and another polarized pointing downward creating what is also commonly known as a mercaba.
Nassim Haramein noticed the only "3D" geometry you can make with 6 solid lines is a tetrahedron and in order to make the second tetrahedron of a star tetrahedron you would need 6 broken lines to pass through the solid lines of the first tetrahedron. Nassim decoded the I Ching by showing how 6 solid lines and 6 broken lines are both the building blocks of the I Ching and that of a star tetrahedron.
Thus, the I Ching encodes the most fundamental geometric information you need to build the geometry of the universe!
