What Is a Hologram?
A hologram is a physical structure that diffracts light into an image. The term ‘hologram’ can refer to both the encoded material and the resulting image. A holographic...
Read MoreA hologram is a physical structure that diffracts light into an image. The term ‘hologram’ can refer to both the encoded material and the resulting image. A holographic...
Read MoreHow Are Toy Balloons Made? The balloons you see at the circus or a birthday party began as latex, the milky liquid of rubber trees. In the balloon factory, workers dip...
Read MoreDid you ever see a fruit with rind hard enough to use as a cooking pot? A gourd is such a fruit. Gourds are ornamental fruits that are closely related to squashes and...
Read MoreHow Does Coral Grow? Beneath the surface of the sea lie coral formations of many shapes and colors. The formations may look like branching trees tinted green or...
Read MoreHow Do Clouds Change Shape? Clouds are made mostly of tiny droplets of water floating about on currents of air. On a windy day, the air currents may stretch a cloud out...
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