十万个为什么·科学阅读30篇（4）

1 Why Do Mirrors Reverse Left and Right—but Not Up and Down? 镜子为什么左右颠倒，却不上下颠倒？ 2 How Do Fireflies Produce Cold Light Without Burning? 萤火虫如何发出不发热的冷光？ 3 Why Does Rain Smell So Fresh After a Storm? 为什么雨后空气闻起来格外清新？ 4 Why Do Some People See Stars When They Stand Up Too Fast? 为什么突然站起时眼前会冒金星？ 5 How Do Bees Communicate the Location of Flowers? 蜜蜂如何告诉同伴花蜜的位置？ 6 Why Do Mountains Look Bluer the Farther Away They Are? 为什么远处的山看起来更蓝？ 7 Why Do We Yawn When We’re Tired—or Even When Others Do? 为什么疲倦时打哈欠，甚至看到别人打哈欠也会跟着打？ 8 How Do Chameleons Change Color Beyond Camouflage? 变色龙变色，真的只是为了伪装吗？ 9 Why Do Bananas Glow Blue Under Ultraviolet Light? 香蕉在紫外灯下为什么会发蓝光？ 10 Why Do We Hear Thunder Several Seconds After Seeing Lightning? 为什么先看到闪电，几秒后才听到雷声？ 11 How Do Trees Survive Winter Without Freezing Solid? 树木如何在寒冬中避免被冻成冰棍？ 12 Why Does Ice Float—And Why Is That So Important for Life? 为什么冰能浮在水面上？这对生命有多重要？ 13 Why Do Some Clouds Appear Green Before Severe Thunderstorms? 为什么强雷暴来临前某些云会呈现绿色？ 14 How Do Magnetic Fields Protect Earth From Solar Wind? 地球磁场如何抵御太阳风？ 15 Why Do Desert Plants Bloom Only After Rare Heavy Rains? 为什么沙漠植物只在罕见的暴雨后开花？ 16 How Do Ocean Gyres Concentrate Plastic Waste Into Massive Patches? 海洋环流如何将塑料垃圾聚集成巨型垃圾带？ 17 Why Do Some Volcanoes Emit Blue Flames Instead of Red Lava? 为什么有些火山喷发蓝色火焰而非红色岩浆？ 18 How Do Certain Moths Navigate Using Starlight Alone? 某些蛾类如何仅靠星光导航？ 19 Why Do Certain Lichens Grow Only on Acidic Rock Surfaces? 为什么某些地衣只生长在酸性岩石表面？ 20 How Do Deep-Sea Anglerfish Use Bioluminescence to Hunt in Total Darkness? 深海琵琶鱼如何利用生物发光在完全黑暗中捕食？ 21 Why Do Snowflakes Always Have Six Sides—But Never Two or Five? 为什么雪花总是六边形，却从不会是二边或五边形？ 22 How Do Termite Mounds Regulate Temperature and Humidity Without Electricity? 白蚁丘如何在不使用电力的情况下调节温度和湿度？ 23 Why Do Some Cacti Flower Only at Night—and Release Strong Fragrance After Sunset? 为什么一些仙人掌只在夜间开花，并在日落后释放浓烈香气？ 24 How Do Magnetotactic Bacteria Navigate Using Earth’s Magnetic Field? 趋磁细菌如何利用地球磁场导航？ 25 Why Do Certain Lava Tubes Remain Warm for Decades After Eruption? 为什么某些熔岩管在喷发后数十年仍保持温暖？ 26 Why Do Some Desert Ants Navigate Using Polarized Light Patterns? 为什么某些沙漠蚂蚁利用偏振光模式导航？ 27 Why Do Glaciers Emit Low-Frequency Rumbles Before Calving Events? 为什么冰川在崩解前会发出低频轰鸣声？ 28 Why Do Certain Fungi Produce Bioluminescent Mycelium Only in Darkness? 为什么某些真菌仅在黑暗中产生发光菌丝？ 29 Why Do Salt Flats Form Hexagonal Cracks During Dry Season? 为什么盐滩在旱季会形成六边形裂纹？ 30 Why Do Lightning Rods Sometimes Trigger Upward Streamers Before Cloud-to-Ground Strikes? 为什么避雷针有时会在云地闪击前触发向上先导？