Physics
Photons: Particles of Light
Quick fact
A single photon takes about 8 minutes to travel from the Sun to Earth, but once it arrives, it can be absorbed by a single chlorophyll molecule in a plant leaf, providing the energy for photosynthesis.
Why this is interesting
You see light all around you, but have you ever wondered what it's made of? Imagine tiny packets of energy zooming through space at the speed of light — those are photons.