Spring is here, holidays are approaching and as an end-of-exams celebration, students and their families throw a lot of confetti over the celebrating ones. Confetti is difficult to clean up and often end up in the stormwater in shape of micro…
Maritime canals and straits play a critical role in international trade and they usually experience heavy shipping traffic. For instance, the Suez Canal, an artificial sea-level waterway in Egypt and considered the greatest engineering feats in the nineteenth century, recently…
Rainbow in the sky – where does the rainbow come from and why is it round? First it rains, then the sun begins to shine. And with a little luck, a brightly colored rainbow starts to appear in the sky….
Masks: A sign of solidarity It’s hard to imagine everyday life without them – whether shopping or at school, masks are always with us, because we want to protect ourselves and our loved ones. And in order to maintain its…
Because of Corona we all have to keep distance from each other. Countries use various measures. In the Netherlands, for example, a distance of 1,5 meters must be maintained, but in other countries such as France it is only 1…
Magnificent avenues of horse chestnut trees have adorned the city parks for over a hundred years. Have you ever taken a closer look at the remarkable inflorescences and striking leaves? Was it also a pleasure for you in kindergarten to…
Microorganisms are part of our daily lives and they are present in our environment. They live anywhere, surrounding us, both in our body and/or the outside. Many of them do not have effects on our health, but some of them…
No contrails, but blue sky and bright sunshine. Spring 2020 brought lots of good weather – but also curfews and travel bans. Instead of spending Easter at the beach or visiting grandma and grandpa, staycation was the order of the…
The best case and the worst case testing scenarios are extremely rare in a real setting. You could explore real case situations by means of a dynamic geometry simulation (see simulation link above). Let N be the number of inhabitans,…
Testing large quantities of blood samples to detect one or more positive sample(s) of a virus disease is expensive and time consuming. What if we decide to make pools of samples to optimise the process? How do we do it?…
