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Want facts and want them fast? Our Maths in a minute series explores key mathematical concepts in just a few words.
A basic introduction to the most powerful tools in science and enginnering.
As COP28, the 2023 United Nations Climate Change Conference, kicks off we look at how maths can help understand the climate crisis.
How do you create dramatic film out of mathematics? We find out with writer and director Timothy Lanzone.
Mathematics plays a central role in understanding how infectious diseases spread. This collection of articles looks at some basic concepts in epidemiology to help you understand this fascinating and important field, and set you up for further study.
Find out why the formula we use to work out conditional probabilities is true!
"If you were watching a film of the object's motion, say a ball gently rolling across a floor, you wouldn't be able to tell if the film was playing forwards or backwards. "
This is not quite true. If the observer had sufficiently accurate measuring instruments, they would notice the ball's energy changing due to friction as it rolls across the floor. This change of energy will tell the observer which direction the film is running. If the energy is increasing the film is running backwards. As there are no frictionless surfaces in the real world, we can always find the direction of time.
The error in thinking you are making is deciding which equations describe the "real" we live in and which describe Plato's cave  a world we do not inhabit.