Marney: Blog Of The Day

Microwaves heat food from the hot air it makes. A microwave does no harm to your food it just heats it up.  Microwaves were invented in the 1940s.  The person who invented the microwave was called Percy Spencer.  You can not put metal in a microwave because it can melt in to your food and can hurt you.

 This is Percy Spencer and he made up microwaves