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Clip: Season 44 Episode 18 | 3m 15s
Geologists think these iconic chalk cliffs hold an extraordinary secret.
Aired: 10/17/17
National corporate funding for NOVA is provided by Draper. Major funding for NOVA is provided by the David H. Koch Fund for Science, the Corporation for Public Broadcasting and PBS viewers.
Scientists uncover geologic evidence of epic floods that tore through ancient landscapes.
NOVA uncovers the secrets of nature’s battleground—claws, horns, fangs and all.
Scientists uncover geologic evidence of epic floods that tore through ancient landscapes.
Experts reconstruct the Great Hurricane of 1780 to help predict the risk of future storms.
Scientists hunt for a mega-eruption that plunged medieval Earth into a deep freeze.
How has China’s magnificent Forbidden City withstood centuries of earthquakes?
Discover the world of medieval knights and see how their armor was made.
Follow Cassini's final days as it skims the cloud tops before plunging into the planet.
The country’s first solar eclipse in 99 years will cast a light on the Sun’s secrets.
A team of experts rebuild an ancient battle chariot to help uncover its design secrets.
