usa
How many states was it again? 52? 50? That depends on who you ask. This year, the United States is turning 246 years old. It’s brought the Netherlands popcorn with butter, microwaves, and the Super Bowl. Supersized meals, as well as weapons and school shootings. The USA has not always found itself on the right side of history, and sometimes the 'united' in the United States is hard to find. Yet we see Uncle Sam as a good friend, especially today: Dutch-American Friendship Day.
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Playing with mathematics
Maths is really everywhere. Make a whirlpool and build your own bridge. Discover what sound looks like and play with perspective like an art...
Planktonium
Museum De Lakenhal shows planktonium by Jan van Ijken: a magical art film about the life of plankton.
The Leiden Maths Walk
For lovers of maths, there's a walk they can go on all by themselves: The Leiden Maths Walk with challenging mathematical questions.
