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Postbus 71 is here for all your science related questions!

or send it to vraag@postbus71.nl,

ask it on twitter @postbus71 

or send it by snailmail to

Postbus 71, 2300AB Leiden

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What are these dots in my floor?

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What is in this rock?

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Can tiny underwater insects and invertebrates think?

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What is the use of the mosquito?

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How is metal made?

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For how long does the earth exist?

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In what vessel did people carry water throughout the centuries in Leiden?

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What do they put in food to make it addictive?

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How did the sun come into being?

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What is a black hole made of?

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What is the link between migraines and storm?

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Are more languages disappearing now than say 2000 years ago?

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Acupunture, does that work?

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How can some plants flower months earlier with warm weather?

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Where does the wind come from?

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How does it work in your brain if you have many eyes like a spider, what do you see then?

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Why do we stil not have flying cars?

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Where did the world come from and how did it start?

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Why do humans have different eye colors?

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Why do people get bald?

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How come people are left or right handed?

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How many stars are there at ten light minutes from us?

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How can infinite mass come from one point?

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Would it not be better if we transition to driving on hydrogen immediately?

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Do quantum computers require a specific algorithm?

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If a dandelion comes from a seed, and that seed from a dandelion, where did the first dandelion come from?

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What happens if lightning strikes in water?

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Why don't some plants need earth to grow?

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Why is the sky blue?

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How many stars are in the sky?

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Can we use the nitrogen produced by farmers as a source of green energy?

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Why is it unhealty to eat candy?

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Was there an earth before our earth?

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Does building a new nuclear powerplant take more energy than it delivers?

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Is there an infinite amount of water? And where does it come from?

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Is there life in space?

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Why do stars explode?

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How do climate variables get established?

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Which plants that grow in Leiden can I eat?

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Can you be in love with multiple people?

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What is the state of our science discourse? Do dissenting voices get a place?

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How did the first being on earth come into existence?

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What is spider web made of and why is it so strong?

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Does my immune system want to keep me alive and why?

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What would happen if the earth suddenly stopped turning?

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If the earth would be full of people, how many people would there be?

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Why are so many languages disappearing?

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Does our body position influence how we feel?

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Why do you change teeth?

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What did the Neu5Ac mutation do for the evolution of humans?

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How can some plants live so much longer than animals?

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Are asteroids as hot as the sun?

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How much CO2, methane, manure, N2 and so on do human farts produce?

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What colour is most common in the Netherlands?

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Is chewing gum plastic?

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Can we use old mines to extract geothermal energy?

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What's behind the universe?

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Why do I sometimes remember my dreams and sometimes not?

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Can bacteria help fight against viruses and viruses against bacteria?

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Why don't you stand upside down ont the South pole?

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How do crystals grow?

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How come some felines have slit-shaped pupils and other round ones?

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Can you adopt a child as a single parent?

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How can empty space have properties that are measurable?

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Can you make animals from animal cells?

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What happens in your body when you eat way too much?

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When does the sun explode?

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What happens with my body if I enter a black hole?

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How do bones grow?

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Why do rats gnaw at electric wires?

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