What makes the battle against microplastics so difficult? What’s the average age of the freighters navigating the world’s seas? What can private citizens use to produce drinking water? Delve into the oceanic world and test your knowledge.

What was the price of the most expensive NFT ever? What does "urban mining" actually mean? And how many pieces of debris do you think are hurtling through orbit? Test your knowledge in our tech quiz.

How many tons of sand does a normal family home actually consume? What "plastic" gamechanger does the start-up Traceless Materials have in its hands? Immerse yourself in the world of materials! Test your knowledge in our tech quiz!

What groundbreaking invention did gardener Joseph Monier present at the 1867 World’s Fair in Paris? And what was Albert Einstein’s profession when he came up with his “E = mc²” formula in 1905? Immerse yourself in the world of inventors!

What world record was set by an XXL mega combine harvester? Which oversized robot is on the road in Helsinki? Do you have experience with spectacular vehicles? Then test your knowledge!

What is special about the “anti-solar cell?” What is the Great Green Wall in Africa? Sustainability is one of the most important megatrends of our time - test your knowledge.

Does a greenhouse effect exist on Mars? How fast does the world’s fastest electric airplane fly? What will soon open in space? Aerospace is fascinating – go ahead and test your knowledge.