Measuring quantum gravity has proven extremely challenging, stymying some of the greatest minds in physics for generations.
For over a century, the two leading theories in physics have had irreconcilable differences, and scientists have scrambled to find ways to square them, to no avail. An experiment proposed in 1957 by American luminary Richard Feynman, is now getting a makeover, and the results could be significant.
What happens up there directly affects life down here. From star-gazing to quantum mechanics, astronomy is one of humanity's great thruster engines of innovation.
Alex Filippenko is a
and recipient of the prestigious Hertz Foundation Grant for graduate study in the applications of the physical, biological and engineering sciences. Where does UC Berkeley Professor Filippenko begin to explain the importance of astronomy? In this video he explores how it captures the attention of children, who then grow up to become scientists across all disciplines; and the more abstract, impractical research that eventually leads to spinoff technology that radically changes our lives. With the support of the Fannie and John Hertz Foundation, Filippenko pursued a PhD in astronomy at the California Institute of Technology.
Time is this wild fourth dimension in nature, says Bill Nye. We depend on its neat measurements for survival – but subjectively it continues to elude us.
Our brains are terrible clocks. An hour can pass like a few minutes, a day can drag on for what seems like two. Because of that, we’re not always sure that time is real – is it just a label we’ve stuck onto the observed patterns of our universe? We can’t see, feel, or hear time, we can only see its effect on us and on things over the course of our lives. Bill Nye believes its both subjective and objective – there is something definitively measurable to time, and yet it’s so mysterious to our brains. Nye thinks (or hopes) that in his lifetime, a new discovery will be made about the nature of time and space-time that gives us some more answers about this curiosity-inducing fourth dimension. Bill Nye's most recent book is Unstoppable: Harnessing Science to Change the World.