Nicholas Herlambang 
Look at a mountain, a beach, a canyon, or even an ordinary piece of gravel, and you are looking at material with a remarkably long history. Earth contains thousands of different rock types and mineral combinations. Some rocks formed from cooling magma deep underground. Others accumulated from layers of sand, mud, or shells. Some were … Read more
Look up on a clear day and the sky appears blue from horizon to horizon. It seems like one of the simplest facts about the natural world. But the blue sky is actually the result of a remarkable interaction between sunlight and Earth’s atmosphere. Sunlight may look white, but it contains a mixture of many … Read more
Falling in love can make the world feel different. Food may taste better. Music can feel more emotional. You might think about one person constantly, lose track of time during conversations, or feel an unusual rush of excitement when you see their name appear on your phone. Although love can feel mysterious, scientists have found … Read more
The ground beneath your feet may look completely ordinary. A stone on a hiking trail, a piece of granite in a building, or a layer of rock exposed along a road can seem like nothing more than part of the landscape. But some rocks are extraordinarily old. Certain minerals on Earth formed more than 4 … Read more
On a freezing winter day, salt can do something that seems almost impossible: it can make ice melt even when the surrounding air is below the normal freezing point of water. This simple trick is used to de-ice roads, sidewalks, driveways, and steps in cold climates. But how can a solid crystal of salt cause … Read more
Human blood may look the same from the outside, but it is not biologically identical from person to person. Some people have type A blood, others have type B, AB, or O. There is also another important classification called the Rh system, which determines whether blood is described as positive or negative. These differences are … Read more
Mountains may look permanent, but many of the world’s greatest peaks are still being shaped today. Deep beneath Earth’s surface, enormous tectonic plates are constantly moving. Their motion is slow—often only a few centimeters per year—but over millions of years, those tiny movements can produce some of the most dramatic landscapes on the planet. When … Read more
Fire looks simple at first glance. A flame flickers, gives off heat, and produces light. Yet look more closely and you may notice something surprising: flames can appear blue, yellow, orange, red, or even green and violet. Why does fire change color? The answer lies in chemistry and physics. The color of a flame depends … Read more
Every year, millions of birds embark on journeys that can span thousands of miles. Some cross oceans, deserts, and mountain ranges, often returning to the same breeding or wintering grounds year after year. But how do they know where to go? Bird migration is one of nature’s most remarkable navigational abilities. Birds do not rely … Read more
A mountain may look like one enormous mass of stone, but up close, it can tell a very different story. Walk across a mountain range and you may encounter granite, limestone, sandstone, shale, volcanic rocks, metamorphic rocks, and countless variations in between. Some layers may have formed from ancient oceans, while others were created deep … Read more