That honeybees are skillfully building hexagonal honeycomb cells has been well known for centuries. Whoever is lucky enough to see these structures in real life can only be fascinated by the extremely precise construction art of these small insects. The…
Summer holiday walks call for interesting adventures! As you walk through your city or the town you are visiting, pay close attention to important or interesting houses and read historical or current information boards. But especially look out for special…
Sunny spring offers the joy of blossoms and fresh greens. This is also an intensive period of decision-making for every gardener: what to grow, where to seed, or is there enough seeds? Tom and Ana decided to plant sweet peas…
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…
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?…
Plastic waste, environmental pollution, a virus, that keeps the whole world in suspense – isn’t there one good thing left on earth? Can we create something good out of all this? In Greece, many schools, organizations and municipalities collect…
The Christmas holidays are just over and after a few days of everyday life we already long for the holidays again. Spring season can’t come fast enough – so how about a few relaxing days at the seaside then? For…
During autumn the leaves of trees change color from green to yellow, orange and sometimes even dark red. And next they fall down, announcing winter time. Would you like such a leaf carpet in your bedroom? Children enjoy the great…
