10 mysteries that physics can’t answer… yet

Illustration of a silhouetted person looking at a fallen bicycle by Carlo Giambarresi

From why we travel forwards in time to how bicycles travel forwards at all, we present the questions great and small that our finest minds can't explain

Image: Carlo Giambarresi

COSMOLOGY

CYCLING

QUANTUM SCIENCE

TIME AND SPACE

MISSING DIMENSIONS

CASIMIR EFFECT

LIQUID CHAOS

What is glass?

Things aren’t as clear as you might think. Glass is a weird kind of solid liquid – and how it comes to be like that defies all explanation

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FIELD OF ICE

Why is ice slippery?

Most think it’s down to a liquid layer, but can’t agree on how it forms. One theory insists it’s a “supersolid skin” capable of electrostatic repulsion

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PARTICLE PHYSICS

SOLAR SYSTEM

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HUMAN BRAIN

BIG IDEAS

10 discoveries that would change everything

Every now and then an idea comes along that upends how we see ourselves and our place in the cosmos. Earth goes round the sun. We are descended from apes. Our hearts are merely pumps made of meat.

The rumblings of the next revolutions in our thinking may already have started. Here are 10 “what ifs” with the potential to change us forever.

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