Stefan Al: Why isn't the Netherlands underwater?
In January 1953, a tidal surge shook the North Sea. The titanic waves flooded the Dutch coastline, killing almost 2,000 people. 54 years later, a similar storm threatened the region. But this time, they were ready. This was thanks to a massive, interlocking system known as the Delta Works— the most sophisticated flood prevention project in the w...
Stefan Al: What happens if you cut down all of a city's trees?
By 2050, it's estimated that over 65% of the world will be living in cities. We may think of nature as being unconnected to our urban spaces, but trees have always been an essential part of successful cities. Humanity has been uncovering these arboreal benefits since the creation of our first cities thousands of years ago. So what makes trees so...
Stefan Al: Will there ever be a mile-high skyscraper?
In 1956, architect Frank Lloyd Wright proposed a mile-high skyscraper, a building five times as high as the Eiffel Tower. While this massive tower was never built, today bigger and bigger buildings are going up around the world. How did these impossible ideas turn into architectural opportunities? Stefan Al explains how these megastructures beca...
Stefan Al: Could we build a wooden skyscraper?
Towering 85 meters above the Norwegian countryside, Mjøstårnet is the world's tallest wooden building, made almost entirely from the trees of neighboring forests. But as recently as the end of the 20th century, engineers thought it was impossible to build a wooden building over 6 stories tall. So how do wooden structures like this compare to ste...
Alex Gendler: A day in the life of a Cossack warrior
The year is 1676, and a treaty has officially ended hostilities between the Polish-Lithuanian Commonwealth and the Ottoman Empire. Despite a serene sunset on the Dnipro river, the mood is tense for the Zaporozhian Cossacks. Renowned as one of Europe's most formidable military forces, they are in the midst of a power struggle. Alex Gendler outlin...
Stefan Al: The future of parking spaces