How Muslims believed earth was spherical long before anybody mentions it.

[Norman Humann]

Or - Prayers follow geodesics and Muhammad invented differential geometry!1!!1

I was told I should pray with my hands together and fingers pointing upwards, not with hands clasped and fingers pointing downwards, because apparently the direction the fingers point is where the prayers go, hence I would be praying to satan if I clasped my hands. So you see, it's all in the fingers...