Megacities
Cities have been around for thousands of years; the first ones appeared in about 3,000 BC....
How often do you use figures of speech when you're talking with friends? Have you said "I'm not going to stick my neck out for him" when a friend has asked for too big a favor? Figures of speech are the hand-me-downs of language, they are expressions that people coined so long ago that most of us have forgotten where they came from. "That's the ticket," which is a colorful way of simply saying yes, is actually a mispronunciation of the French word "etiquette." The expression used to be "that's etiquette," meaning it's the correct way of doing something. To "stick one's neck out" has a less pleasant origin. American farmers made up the saying in reference to stretching out a chicken's neck for the axe!
Cities have been around for thousands of years; the first ones appeared in about 3,000 BC....
Even though the oldest dinosaurs lived 230 million years ago, we are still studying them t...
Long before the invention of modern scuba equipment, people used something called a diving...