2 . Did you know that horses talk? Well, they do, and you can lean to understand “horse talk” if you pay close attention to the horses you see.

When horses live in the wild, other animals try to eat them, so a lot of horse talk is about staying alive. Even now, when most horses live on farms, they watch for danger. For this reason, never walk behind a horse. If you surprise it, the horse might mistake you for a mountain lion or wolf and give a dangerous kick.

By watching the ears of a horse, you can get clues to what it's hearing. A horse can turn each ear in a different direction. For a wild horse, this trick is important for survival. The horse can hear something sneaking up behind it while also checking out a threatening noise in front. When a horse lets its ears down, it's feeling safe and relaxed. If horses become isolated, they neigh, or “whinny,” calling for company. They're saying, “Where are you? I'm over here!” If a horse snorts(哼) while holding its head high and staring at something, it's saying, “That looks dangerous. Get ready to run!” When two horses meet, they put their noses together and smell each other's breath. It's their way of asking, “Are you a friend?” Horses nicker, too. Nickering is a quiet sort of sound. This friendly noise means they're feeling secure and saying, “Clad to see you.”

In the wild, horses live in herds, with all members watching for danger. In a herd, only one horse is the leader, the “boss hoss”. The “boss hoss” is usually an older female. She watches for threats and teaches younger horses how to behave. However, others may want her job. When that happens, she pins her ears back against her head and may even bite or kick to get challengers to back off. She's using body language to say, “Hey, I'm in charge here!” All horses know that the one who makes others move is the leader. Horses relate to people that way, too.

Horses have a language of their own. Now you know a bit of what they might be saying.

3 . Bees are extremely important to our health and survival. As pollinators (授粉者), they are responsible for about a third of the food we eat. However, the bee population worldwide are on the decrease.     1    .

Some bee species defend their hives (蜂巢) with large balls of heat

The body temperature of bees is typically similar to their surrounding environment. But within the hive, bees maintain a steady temperature of around 92—93 degrees Fahrenheit year-round. Using their wings, bees can fan hot air out of the hive to cool an area.     2    . When an enemy invades, together they will create a large ball around it to cook the invader alive.

Bees help farmers grow better food and keep food prices down

Bees are highly efficient pollinators. When bees are employed to pollinate, the quantity and quality of the crops improve surprisingly. As the climate continues to change, many animals will move to more favorable habitats.     3    . With the reducing numbers of bees, the cost of over 130 fruit and vegetable plants that we rely on for food in is going up in price.

Policemen find murderers by studying bees

    4    . Similarly, criminals avoid committing crimes close to where they live, Police can make reasonable guesses about where a suspect might live or visit regularly.

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Bees are able to pick out individual characteristics on human faces and recognize them. This ability not only helps these highly social creatures recognize each other, but it also helps them recognize and return to flowers they like best.