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Tick-tock tussles: Why physicists can't agree on time

By Shane Huntington

Prof Craig Callender tells us how physics has changed our understanding of time and why some even argue that the notion of time is unnecessary.

The full text of this article can be purchased from Informit.

Welcome to Up Close, the research talk show from the University of Melbourne, Australia.

I'm Dr Shane Huntington. Thanks for joining us. Each day, each month, each year, we experience the sensation that time is passing. Our culture, language and much of our technology are based around concepts of time. But what is time? Is it something that really exists in nature, or merely a social construct? Is it equivalent to other things that we can measure, like temperature, length or mass? Certainly, we can measure time with great accuracy and precision, but should we even bother? The speed at which we perceive its passing depends heavily on what we're doing. Time flies when we are having fun is not just an expression. It accurately describes the inability of our brains to consistently measure the passage of time.Today on Up Close, we'll be exploring the concept of time, how it has been used by scientists over the centuries and whether or not it really is a concept that we need at all. To help us explore these questions, we are joined by Craig Callender. Craig is a professor and Chair of Philosophy at the University of California, San Diego. Craig is joining us via a Skype...

The full text of this article can be purchased from Informit.