Pink Floyd decides to perform The Dark Side of the Moon on the dark side of the moon. They've got millions of fans to purchase
tickets and board the latest Space Z rocket to go to the moon.
When everyone comes home from the concert they insist Pink
Floyd forgot to turn on their amps. Why do they think this?

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude

What is the chemical formula for the compound formed between sodium and flour one

Ascientist wants to know how individual lions within a pride interact with each other in their own environment. to do this, the scientist sedates and tags all of the lions within a pride. then, he places several remotely-controlled video cameras near the lions' den and performs an observational field study. he collects continuous video footage over the span of one year, analyzes the video, and then forms conclusions based on his observations.