Sea Cucumber: Animal or Vegetable?

Although most people today will never set foot on the moon, it's likely you come into contact with a NASA byproduct every day. Partnering with various research teams and companies, NASA continues to spawn a vast array of new technologies that have improved our daily lives. See more

How Uno Works

Are you looking for a game that's easy to learn, simple to play and fun for everyone? UNO, one of the world's most popular card games, may fit the bill perfectly. Like most games, it's great for a family gathering, a rainy day, or whenever cries of "I'm bored" threaten to spoil a long afternoon. After all, who could resist its simple appeal, bright colors and opportunities to shout in the face of imminent victory? See More

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Ice Crystals Cause Beautiful Noctilucent Clouds

In 1885, two years after the cataclysmic Krakatoa eruption, many onlookers reported luminous, mesmerizing clouds adrift in twilight skies. As far as historians know, these accounts were the first documented sightings of noctilucent — or "night shining" — clouds. Thin, tufted and faint, the night shiners aren't very dramatic shape-wise. But other qualities really make them stand out. The color scheme of noctilucent clouds usually ranges from electric blue to silver, although they can also look reddish-orange. And as the term "night shining" implies, the rippling wisps glow in the dark. See More >>>