執筆者 Modern English | 2016年08月25日 | Trivia
A sinkhole is a hole that forms when the surface collapses after the rock below is worn away. They can also form when a cave or tunnel collapses. They can form gradually or suddenly and they can be big or small. Some can become huge lakes, and others can suddenly...
執筆者 Modern English | 2016年08月04日 | Trivia
Animals can do many things by instinct. For example, baby sea turtles crawl into the ocean. Birds can build nests. Some behaviors that seem like instinct also require learning from older animals. Of course, humans also have instincts! ...
執筆者 Modern English | 2016年07月28日 | Trivia
A black hole is very dense. It forms when a massive star dies and collapses. Its gravity is so strong that close to the black hole not even light can escape. In the center of a black hole is a point of infinite density. ...
執筆者 Modern English | 2016年07月21日 | Trivia
Dolphins live in the ocean, but they are mammals. There are many kinds of dolphins, but the most well-known is the Bottlenose Dolphin. Dolphins use sound waves to “see” objects in the water. This is called echolocation. ...
執筆者 Modern English | 2016年07月14日 | Trivia
How can fish breathe underwater? They have gills instead of lungs. Lungs are organs that extract oxygen from air. Gills do the same with water. The slits on either side of a fish’s head are its gills, but other animals have gills that look different....
執筆者 Modern English | 2016年07月07日 | Trivia
“Coffee is an acquired taste.” Children instinctively like sweet foods such as candy, but often don’t like bitter foods such as coffee or grapefruit the first time they try them. As you get used to these foods, you may come to like them, or acquire a taste for...
