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//player.pbs.org/partnerplayer/Qo0q2bK-nZgcqtXpePWgsw==/?topbar=false&end=0&endscreen=true&start=0&autoplay=false In 2018, Italy’s Morandi Bridge collapsed, tragically killing 43 people. For 50 years, the iconic bridge had withstood the elements—and stress from ever-increasing traffic. What went wrong that fateful day? And how can new engineering technology protect bridge infrastructure to prevent such tragic... /episodes/get/96862 /episode/96862 Why Bridges Collapse /episode-player/96862

In 2018, Italy's Morandi Bridge collapsed, killing 43 people. NOVA investigates what went wrong and explores other bridge collapses across the United States. How can new engineering techniques make bridges safer and prevent such tragedies?

Air date:
Wed, 10/16/2019 - 04:45
Expired

Beyond icy worlds of Uranus and Neptune, Pluto dazzles with its mysterious ocean.

Air date:
Wed, 07/24/2019 - 04:45
WGBY 57/HD
Wed Jan 8th, 9:00pm
Thu Jan 9th, 1:00am
Fri Jan 10th, 5:00am
Sun Jan 12th, 1:00am
Sun Jan 12th, 4:00pm
WGBY World
Thu Jan 9th, 7:00pm
Fri Jan 10th, 12:00am
Fri Jan 10th, 8:00am
Fri Jan 10th, 2:00pm
Expired

The rocky planets - Mercury, Venus, Earth and Mars - were born of similar material around the same time, yet only one supports life. Were Earth's neighbors always so extreme? Is there somewhere else in the solar system where life might flourish?

Air date:
Wed, 07/24/2019 - 04:45
WGBY 57/HD
Wed Jan 15th, 9:00pm
Thu Jan 16th, 1:00am
Fri Jan 17th, 5:00am
WGBY World
Thu Jan 16th, 7:00pm
Fri Jan 17th, 12:00am
Fri Jan 17th, 8:00am
Fri Jan 17th, 2:00pm
Expired

Jupiter's massive gravitational force made it a wrecking ball when it barreled through the early solar system. But it also shaped life on Earth, delivering comets laden with water - and perhaps even the fateful asteroid that wiped out the dinosaurs.

Air date:
Wed, 07/24/2019 - 04:45
Expired

NASA's Cassini reveals the mysteries of Saturn's rings—and new hope for life on a moon.

Air date:
Wed, 07/24/2019 - 04:45
Expired

Before it was a dry planet, Mars was a wet world that may have hosted life.

Air date:
Wed, 07/24/2019 - 04:40
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