13个你未必知道的常识

1. Owls are the only birds that can see the colour blue.
猫头鹰是唯一能看见蓝色的鸟类。

2. Your stomach has to produce a new layer of mucus every two weeks otherwise it will digest itself.
为了防止把自己消化掉，你的胃不得不每隔两周就造出一层新的粘膜。

3. People will say “Bless you” when you sneeze because your heart stops for a millisecond.
当你打喷嚏时，人们会说“上帝保佑你”，那是因为你的心脏停跳了一毫秒。

4. You spend about 23 years sleeping in a 70 year life.
在70年的生命中，你大约要花23年的时间睡觉。

5. A cat has 32 muscles in each ear.
猫的每只耳朵上有32块肌肉。

6. Pigs can become alcoholic.
猪有变成酒鬼的能力。

7. Butterflies taste with their feet.
蝴蝶用脚品尝味道。

8. All polar bears are left-handed.
所有的北极熊都是左撇子。

9. Bats use ultrasound to pick up vibrations from their prey.
蝙蝠用超声波识别猎物发出的震动。

10. An average head has between 100,000-150,000 hairs.
人们头上通常有10万到15万根头发。

11. In our solar system, the earth is the lucky planet that has the right temperature to recycle water.
在太阳系中地球是个幸运的星球，因为它有适宜的温度可以使水再循环

12. Nails grow at 3 mm per month.
指甲每个月会长3毫米。

13. Hair on your head grows at 10-13mm per month。
的头发每个月会长10至13毫米。