Science asks big questions about the nature of the universe, the nature of the mind and what it means to be human. Understanding how to interpret the answers often takes us into the realm of philosophy, the underpinning of scientific exploration.

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Brazilian aviator Alberto Santos-Dumont's 14-bis biplane takes off from a French field in 1906.
A crow sits on a stop sign along a road running through a desolate landscape.
Could North Korea be behind commentator Alva Noë's car problems? Not likely. Just as it's not likely a theory of everything will ever explain human behavior.
The Prague astronomical clock, or Prague orloj.