Finding them all means living forever. There is a tremendous weight pushing down on the center of the Earth because of so much population stomping around up there these days. Lime is a green-tasting rock. Many dead animals in the past changed to fossils while others preferred to be oil. Genetics explain why you look like your father, and if you don't, why you should.
Vacuums are nothings.
We only mention them to let them know we know they're there. Some oxygen molecules help fires burn while others help make water, so sometimes it's brother against brother. Some people can tell what time it is by looking at the sun. But I have never been able to make out the numbers. We say the cause of perfume disappearing is evaporation.