That science is not truth but our current understanding of reality. This can change as we find out new information and in turn changes the way we view ourselves and the world. In science we always question and refine our views.
Here is a fact I leaned from a student question: Dolphins can sleep with half their brain still alertly active. They think this is a way to constantly be aware of their one predator, sharks. Pretty cool!! But makes me tired just thinking about it….! 🙂
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