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Janna Levin Quote

This world extends beyond this room, Adele. There are the streets of Vienna and beyond that Europe and beyond that a globe in space in orbit around a star in a universe. But how do I know that for sure? I cannot see the globe spinning on its axis right now as I speak to you. How can I be sure? I can be sure because it's logical; the mathematics is sound and respected by the orbits of the planets. I can verify it's true, not by looking at it, but by thinking about it.

Janna Levin

This world extends beyond this room, Adele. There are the streets of Vienna and beyond that Europe and beyond that a globe in space in orbit around a star in a universe. But how do I know that for sure? I cannot see the globe spinning on its axis right now as I speak to you. How can I be sure? I can be sure because it's logical; the mathematics is sound and respected by the orbits of the planets. I can verify it's true, not by looking at it, but by thinking about it.

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About Janna Levin

Janna J. Levin (born 1967) is an American theoretical cosmologist and a professor of physics and astronomy at Barnard College. She earned a Bachelor of Arts in astronomy and physics with a concentration in philosophy at Barnard College in 1988 and a PhD in theoretical physics at the Massachusetts Institute of Technology in 1993. Much of her work deals with looking for evidence to support the proposal that our universe might be finite in size due to its having a nontrivial topology. Other work includes black holes and chaos theory. She joined the faculty at Barnard College in January 2004 and is currently the Claire Tow Professor of Physics and Astronomy.