How does a microwave oven actually heat food?
A microwave can warm a bowl of soup in moments, yet the bowl itself may stay cool. We explain what is happening inside, why food heats unevenly and why standing time matters.
Topic
How things work
How does a fridge keep food cold? A simple explanation
A fridge does not create cold. It moves heat from inside to outside. We explain the cycle that makes it work and a few simple habits that help it run well.