it's talking about three accidental inventions:
Microwave: Invented in 1945 by American scientist Percy Spencer, who discovered it when chocolate in his pocket melted near a machine called a magnetotron. He realized it could heat food — the first item cooked was popcorn.
Coffee: Discovered long ago in Ethiopia by a farmer who noticed his goats stayed awake after eating coffee plant fruit. People started making drinks from it, and now coffee is enjoyed worldwide.
Velcro: Invented in 1941 by Swiss engineer George de Mestral. After a walk, he noticed seeds stuck to his clothes. Under a microscope, he saw tiny hooks on the seeds and designed a hook-and-loop fastener — now known as Velcro.