Browse
14 breaks
AllBiologyComputingEarth & SpaceEconomicsEngineeringFood ScienceHistoryLanguageMindMusic & SoundPhysics
Why a rainbow is always a circle 42° around your shadow
Every rainbow is part of a circle centred on the shadow of your head, with its red edge about 42° away. That number comes from inside a single raindrop…
Why traffic jams appear out of nowhere
Sometimes a motorway grinds to a halt and then clears up with no crash, roadworks or merge in sight. That's a phantom traffic jam, and it starts with one…