Why do bulls get angry when they see red？
为什么公牛一见到红色就生气？2
Why do some animals sleep a11 winter？
为什么有些动物要冬眠？6
Why do dogs bury bones under the ground？
狗为什么将骨头埋在地底下？10
Why do skunks smelI bad？
为什么臭鼬会发出难闻的气味？14
Why do camels have humps？
骆驼为什么长驼峰？18
Can animals also count？
动物也会数数吗？22
Why do animals have tails？
动物长尾巴有什么用？26
Why did dinosaurs die out？
恐龙为什么会灭绝？30
HOW do chameleons change their colors？
变色龙是怎样变色的？34
Why do fl ies ru b thei r legs together？
苍蝇为什么搓腿？38
Why do we feel Rchy atter being bitten by a mosquito？
为什么被蚊子叮咬后我们会觉得痒？42
How do fireflies light up？
萤火虫是怎么发光的？46
Why aren’t spiders caught in their own webs？
为什么蜘蛛不会被自己织的网缠住？50
Can fish drown？
鱼会被淹死吗？54
HOW do fish swim in the dark？
鱼是怎样在黑暗中游泳的昵？58
Why do whales spout water from their head？
为什么鲸鱼的头上会喷水？62
HOW do animals underStand each other？
动物是怎样相互交流的？66
Do animals laugh or cry？
动物会哭笑吗？70
Why do flowers smell good？
花儿为什么那么香？74
Why do people have different skin colors？
为什么人的肤色会不一样？78
How many bones are there in a human body？
人有多少块骨头？82
Why don’t women have beards？
为什么女人不长胡须？86
What makes people sneeze？
人为什么会打喷嚏？90
What causes hiccups？
人为什么会打嗝？94
What causes our dreams？
人为什么会做梦？98
Where did the first people come from？
人类最早来自哪里？102
How many languages are there in the world？
世界上共有多少种语言？106
What iS the NobeI Prize？
诺贝尔奖是什么奖？1 10
What does a wedding ring mean？
结婚戒指有什么意义？1 14
How was the mummy preserved？
木乃伊是怎样保存下来的？118
HOW old iS ice cream？
冰激凌有多少年历史了？122
Why do we get cramps？
人为什么会抽筋？126
Why does hair turn gray as we get older？
为什么人上了年纪头发会变白？130
WhV don。t humans have hair alI over their bodies？
为什么人身上没有满身毛发？134
Do people really eat frogs。legs？
人真的吃青蛙艟吗？138
How are babies born？
婴儿是怎么来的？142
Is there a person in the world who is exactly like me？
世界上有和我完全一样的人吗？146
Why do July and August have 31 days？
7月和8月为什么有31天？150
Why iS it C001 when the wind blows？
为什么风吹时我们会感觉凉爽？154
Why is the ocean salty？
海水为什么是威的？158
How are glaciers formed？
冰川是怎么形成的？162
How does an earthquake start？
地震是怎，厶发生的？166
What are fossils？
什么是化石？170
How is oil located undergrOund？
石油是怎么埋在地下的？174
What are rainbows？
彩虹是什么呢？178
Why does thunder come after lightning？
为什么雷声在I司电之后？182
Why is a day 24 hours？
为什么一天有24个小时？186
What makes the seasons？
季节是怎么形成的？190
Why do the hands of the clock turn to the right？
为什么时钟的指针向右旋转？194
What makes the sunset red？
为什么夕阳是红色的？198
Why don’t we slip from the earth even if it is round？
为什么人不会在圆的地球上滑倒？202
What is the Milky Way？
什么是银河系？206
What is the brightest star in the night sky？
夜空中最亮的恒星是哪一颗？210
What iS a shooting star？
什么是流星？214
How big is the universe？
宇宙有多大？218