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A city-wide competition shaped the career of the architect behind Florence’s famous dome.

Sculpting a Young Artist

Carlisle Companies

Viking

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<div class="rich-text"><p>In 1401, an ambitious young metalworker named Filippo Brunelleschi entered a competition to craft new doors for the Florence Baptistery. Hidden in his bronze panel are early signs of the master Brunelleschi would later become.</p>
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A city-wide competition shaped the career of the architect behind Florence's famous dome.

<div class="rich-text">A city-wide competition shaped the career of the architect behind Florence's famous dome.</div>

Ancient Worlds

United States

Northern Mariana Islands

Puerto Rico

American Samoa

Guam

U.S. Virgin Islands

U.S. Minor Outlying Islands

US & Territories

<p>Colossal explosions shake a remote corner of the Siberian tundra, leaving behind massive craters. In Alaska, a huge lake erupts with bubbles of inflammable gas. Scientists are discovering that these mystifying phenomena add up to a ticking time bomb, as long-frozen permafrost melts and releases vast amounts of methane, a potent greenhouse gas. What are the implications of these dramatic developments in the Arctic? Scientists and local communities alike are struggling to grasp the scale of the methane threat and what it means for our climate future. <b>(Premiered February 2, 2022)</b></p>

<p>In the Arctic, enormous releases of methane, a potent greenhouse gas, threaten the climate.</p>

Arctic Sinkholes

The top half of Jupiter in blue and green against a night sky

A composite image of Jupiter using images captured by the James Webb Space Telescope. Image Credit: NASA, ESA, CSA, Jupiter ERS Team; image processing by Judy Schmidt.

<p>Explore the cosmos, delve into ancient history, and follow an extreme rescue with NOVA’s most-watched documentaries released in 2022.</p>

NOVA’s most popular science documentaries of 2022

Four bright orange loops brand off of a dark blue blob

A transmission electron micrograph of HIV-1 virus particles (orange) replicating from the plasma membrane of an infected H9 T cell. Credit: NIAID, Flickr

<p>Scientists have cured a handful of people of HIV by piggybacking on treatments they received for blood cancer. But does that bring a widespread cure any closer?</p>

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