When two people meet, there are a lot of ways of greeting. The ways of greeting are not always the same in different countries.

In America, two people usually greet each other with a handshake. It is a way to show respect(尊重)to the other person. Athletes from opposite teams shake hands before a game for the same reason. However, most Americans don’t shake hands when they meet people they have already known well. When American friends meet each other, they might only wave(挥手), or maybe just nod(点头)their heads.

In New Zealand, there is a special way of greeting called “Hongi”. In the greeting, two people press their noses and foreheads(前额)together and close their eyes. This is an old tradition that comes from the Maori, who were the first people to live in New Zealand. Even today, many New Zealanders still press their foreheads when they meet.

Kissing is sometimes used as a way to greet someone. In some countries, important people used to wear special rings. It was the custom for visitors to kiss these rings when they came for a meeting. In France, when people meet, they sometimes kiss each other on the face.

In Japan, people bow to each other every time they meet. Even family members bow to each other. People decide how low to bow depending on how respected the other person is.

Today, new ways of greeting are created all the time. People can do this with a quick “hi”, a handshake, or even a simple smile. The important thing is that the people they are greeting understand them.

North American black bears are shy animals. They are fearful (胆小的) by nature, and will usually run away if they see or hear people. Because of this, it can be difficult for scientists to learn about these animals.

In order to study black bears, researchers from New Jersey, USA, catch bears and use drugs (药物) to help them go to sleep. Researchers then work out the size and the weight of the bear, take blood to test for diseases (疾病), remove a tooth and take it to the lab to find out its age. From these studies, researchers want to find out how many bears live in New Jersey, how long they live, and how many babies they produce.

But in Minnesota, USA, researchers study bears that are completely awake. The bears know the researchers’ voices and they are not afraid of the research team. With the help of a few grapes to keep the bears busy, researchers can touch them to check their hearts, look at their teeth, and do other jobs. Researchers can also walk or sit with bears for hours and make videos to learn about their everyday life.

In both places, the main purpose is the same—to make sure there is a healthy population of black bears. But the research methods and the kinds of information that researchers are able to collect, are quite different.

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