for every animal. This includes whales, eagles and even fruit flies (果蝇).How long an animal sleeps, though.... By studying similarities and differences in when and how long different animals sleep, researchers ……

this have to do with your sleep? Well, caffeine can keep you awake (醒着的). It tricks the body..., caffeine can keep you awake (醒着的). It tricks the body into thinking sleep time is a long way ……

anything,” said Mary Carskadon, a sleep researcher at Brown Medical School.How much sleep do you... much sleep do you need? That depends on (取决于) how old you are. The Sleep Foundation says ……

Mary Carskadon, a sleep researcher at Brown Medical School.How much sleep do you need? That depends... at Brown Medical School.How much sleep do you need? That depends on (取决于) how old you are. The Sleep ……

你以为睡得多就会长得胖吗？那可是大错特错啦！词数 150 建议阅读时间 3分钟DO you get enough sleep? With so much homework it's often difficult to get the rest you need. But you need to try, because not only does sleep keep you healthy ……

Dolphins sleep with one eye open! ……

Dolphins sleep with one eye open! ……

Dolphins sleep with one eye open! ……

they normally learn by listening to adults.Q. Can you have too much sleep?A. Yes. The discoveries...: Is a quick "power nap" really as good for you as a full night's sleep?A: Don't be misled by headlines ……

also be taken.Second, you must have regular and sound sleep. This relaxes the eye muscles (肌肉... regular and sound sleep. This relaxes the eye muscles (肌肉) and gives them the rest they need. Sleep can ……

for the rapid eye movement that happens while you are dreaming. During REM sleep, your eyes move back..., for example, “How was work?” They love this!Make it clear what you want to tell your parents. If they have ……

Dolphins keep watching and listening even while “asleep”. They must sleep with one eye open in case of predators (食肉动物). ……

动物为什么有各种各样的睡姿？ How do you sleep? Most people sleep on their backs or sides. Do animals sleep the same way? Actually, the ways they sleep are much more different – they can lie down, sit or stand ……

and sound sleep. It relaxes the eye muscles (肌肉) and gives them the rest required. Sleep can help the body to repair its tired tissues (组织). Usually, you must sleep for at least seven to eight hours every day ……

eye on what food you have at home. Don’t buy too much, especially vegetables and fruit..... Another big reason is food waste (浪费). Most people don’t realize how much food they throw ……