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Hagia Sophia: Istanbul's Mystery Preview

Season 42 Episode 4 | 30s

How has this unique structure, built on a seismic fault, survived centuries of quakes? Airing February 25, 2015 at 9 pm on PBS

National Corporate funding for NOVA is provided by Carlisle Companies. Major funding for NOVA is provided by the NOVA Science Trust, the Corporation for Public Broadcasting, and PBS viewers.
Extras
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The moon Phobos has a mysterious origin but a certain expiration date.
Some large meteorites survive their descent through our atmosphere and land on Earth.
The ocean beneath Europa’s icy shell might be an ideal environment for life.
Hydrothermal vents in Enceladus’ ocean may hold the promise of life.
Enceladus’ small size and icy surface is no limitation to its extreme volcanism.
Martian dust devils may have helped NASA’s rovers restore power during mission.
As comets cross the invisible boundary known as the ice line, their ice starts turning into gas.
Io’s intense volcanic activity defies all expectations.
For millions of years, a tiny moon has made a significant impact on the structure of Saturn’s rings.
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