十万个为什么·科学阅读30篇（2）

1 Why Do Mirrors Reverse Left and Right, Not Up and Down? 镜子为什么左右颠倒，却不上下颠倒？ 2 How Do Rainbows Form When Sunlight Meets Raindrops? 阳光遇到雨滴时，彩虹是怎样形成的？ 3 Why Do Some Animals Hibernate While Others Migrate? 为什么有些动物冬眠，而另一些却迁徙？ 4 What Makes Popcorn Kernels Explode Into Fluffy Snacks? 爆米花的玉米粒为什么会‘爆炸’成蓬松零食？ 5 Why Do We See Static Stars But Feel Earth’s Rotation? 我们看到的星星是静止的，却感受不到地球自转？ 6 How Do Fireflies Produce Cold Light Without Burning? 萤火虫如何发出不发热的冷光，又不会烧伤自己？ 7 Why Does Ice Float on Water While Most Solids Sink in Their Liquids? 为什么冰能浮在水面上，而大多数固体却沉入自己的液体中？ 8 How Do Plants ‘Know’ Which Way Is Up When They Germinate Underground? 植物种子在地下萌发时，怎样‘知道’哪边是上方？ 9 Why Do We Yawn When We’re Tired — And Why Is It Contagious? 人疲倦时为什么会打哈欠？而且它为什么会传染？ 10 How Do Touchscreens Detect Your Finger So Accurately? 触摸屏是如何如此精准地检测到你的手指的？ 11 Why Do Hurricanes Spin Counterclockwise in the Northern Hemisphere? 为什么北半球的飓风呈逆时针旋转？ 12 What Happens Inside a Volcano Before It Erupts? 火山喷发前，内部究竟发生了什么？ 13 Why Do Mountains Stop Growing Even Though Tectonic Plates Keep Moving? 为什么山脉停止生长，尽管板块仍在持续运动？ 14 How Do Coral Reefs Build Massive Structures Without Any Bones or Shells? 珊瑚礁如何在没有骨骼或外壳的情况下建造巨大结构？ 15 Why Do Some Lakes Change Color From Blue to Pink During Dry Seasons? 为什么一些湖泊在干旱季节会从蓝色变成粉红色？ 16 What Makes Certain Desert Plants Bloom Only After Rare Heavy Rains? 为什么某些沙漠植物只在罕见的大雨后才开花？ 17 How Do Magnetic Fields Protect Planets From Solar Wind Damage? 磁场如何保护行星免受太阳风的损害？ 18 Why Do Lightning Bolts Branch Upward From the Ground During Some Storms? 为什么某些雷暴中闪电会从地面向上分叉？ 19 Why Do Certain Clouds Glow Brightly at Twilight? 为什么某些云层在暮色中会发出明亮光芒？ 20 How Do Ants Build Living Bridges Without Central Commands? 蚂蚁如何在没有中央指令的情况下搭建活体桥梁？ 21 Why Does Honey Never Spoil Even After Thousands of Years? 为什么蜂蜜即使存放数千年也不会变质？ 22 What Causes the ‘Barking’ Sound of Some Sand Dunes? 是什么导致某些沙丘发出‘吠叫’般的声音？ 23 Why Do Some Deep-Sea Fish Have Transparent Heads? 为什么某些深海鱼拥有透明的头部？ 24 How Do Geckos Walk Upside Down on Glass Without Glue? 壁虎如何不靠胶水就能在玻璃上倒立行走？ 25 Why Do Some Trees Shed Leaves Only in Spring — Not Autumn? 为什么有些树只在春天落叶，而不是秋天？ 26 How Do Bees Detect Electric Fields Around Flowers? 蜜蜂如何探测花朵周围的电场？ 27 Why Do Certain Clams Produce Light When Disturbed — But Only at Night? 为什么某些蛤蜊受惊时会发光，但仅限于夜间？ 28 What Makes Some Snowflakes Form Perfect Hexagons While Others Look Messy? 是什么让一些雪花形成完美的六边形，而另一些却显得杂乱？ 29 Why Do Some Volcanoes Emit Blue Flames During Eruptions? 为什么有些火山喷发时会喷出蓝色火焰？ 30 How Do Certain Frogs Survive Being Frozen Solid All Winter? 某些青蛙如何在整冬被完全冻成冰块后仍能存活？