I can fly but have no wings. I can cry but have no eyes. Wherever I go, darkness follows me. What am I?

This atmospheric enigma perfectly describes a cloud, a seemingly simple yet profoundly complex component of our planet's weather system. Clouds appear to "fly" across the sky, not with wings, but carried by powerful air currents and winds, sometimes traveling vast distances. Their movement is a constant, visible reminder of the dynamic nature of Earth's atmosphere.

The riddle's second clue, "I can cry but have no eyes," refers to the precipitation that clouds release. When water droplets or ice crystals within a cloud grow heavy enough, they fall to Earth as rain, snow, sleet, or hail – a process often poetically described as the sky "crying." This crucial function of clouds is a vital part of the Earth's water cycle, replenishing freshwater sources and sustaining life across the globe.

Finally, the line "Wherever I go, darkness follows me" speaks to the way dense clouds can obscure the sun. Thick layers of clouds, especially those associated with storms like nimbostratus or cumulonimbus, significantly reduce the amount of sunlight reaching the ground, casting shadows and making the day appear darker. This phenomenon is a clear indicator of impending weather changes, often signaling rain or other significant atmospheric events. Clouds are not just shapeshifters in the sky; they are essential regulators of Earth's climate and powerful drivers of our daily weather.