of course you can use two different hides. it all looks fine to me.
The Big Bang almost certainly (beyond reasonable doubt) happened 13.7 billion years ago. If you disagree, send me a PM.
Evolution is a fact, evolutionary theory explains why it happens and provides four different lines of evidence that coalesce to show that evolution is a fact. If you disagree, send me a PM.
One third of the global economy relies on technology that is based on quantum mechanics, especially quantum electrodynamics (electron-photon or electron-electron interactions). If you disagree, send me a PM.
Time Dilation is real, it is so real that all clocks if they are precise enough can measure it, and GPS could not possibly work without it. If you disagree, send me a PM.
The 4 philosophically most important aspects of modern science are: Evolutionary theory, Cosmology, Quantum mechanics, and Einsteins theory of general relativity. Understand these to get a grip of reality.
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