Chapter 1
The puzzle of gravity
Chapter 2
The quantum clash
Chapter 3
Vibrating strings and extra dimensions
Chapter 4
The ultimate cosmic detective work
YOUR GOAL
Master of Searching for the graviton
Ch 4 · The ultimate cosmic detective work

hue The best chance of finding evidence for gravitons lies in studying the cosmic microwave background radiation.

hue Although we cannot see single gravitons, we can detect massive ripples in spacetime called gravitational waves.

BETA
hue Track quantum clues across space to discover how gravitons pull the universe together.
Fun Fact
Jupiter detector: To detect a single graviton, we would need a detector as heavy as Jupiter placed near a highly dense neutron star.
Quiz
What type of quantum experiment might prove gravity is quantum without detecting a single graviton?