Articles

What can we see?Physics is all about observation. But how much can we actually see with the naked eye?
What can we agree to look for?The limits to what we can observe are not only a matter of science, but also of politics and economics.
What can science see?Observing the smallest building blocks of matter doesn't involve seeing in the ordinary sense.
light bulbs
Maths in a minute: Truth tables

Introducing an indispensable tool of mathematical logic.
rabbit in hat
Something from nothing?If you can prove that a statement can't possibly be false, does this mean it's true?
Jelly?
Heisenberg's uncertainty principleThere are limits to how much you can simultaneously squeeze the quantum fuzziness of an electron's position and momentum
The real numbers and Cauchy sequencesWe take the real numbers for granted, but what are they really?
Citizen science: Schumann resonancesResonant electromagnetic waves, created by lightning flashes, circle the Earth. Wim Hordijk explores the maths and shows how you can keep track with these phenomena.
Maths in a minute: ChompA game involving biscuits and maths — what could be better?
Maths in a minute: The axioms of probability theoryTake a quick trip to the foundations of probability theory.
Arithmetic billiardsNeed to find the least common multiple or greatest common divisor of two numbers? A billiard table of the right proportions holds the answers!
The maths of randomnessRandomness is surprisingly hard to define. Fortunately the mathematical language we use to describe it is beautifully well defined.