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The oldest indirect evidence for the bow and arrow dates to:
Subarachnoid Space
The space between the arachnoid membrane and pia mater around the brain and spinal cord, filled with cerebrospinal fluid.
Dural Venous Sinus
A channel through which venous blood drains from the brain and meninges back towards the heart.
Dural Venous Sinus
Vein-like spaces between the dura mater layers of the brain, draining blood from the brain.
Subarachnoid Space
The area between the arachnoid membrane and the pia mater around the brain and spinal cord, filled with cerebrospinal fluid.
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