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.

"Untitled" by Mark Rothko, on display before auction at Sotheby's, New York, in May. Does its value stem from its pedigree? Or is it valuable because of its contribution to the ongoing dialog that is human expression through the ages?

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