Right this minute you’re being hit by “bullets” from outer space! Space is full of waves. These aren’t the kind of waves you see on an ocean, of course. They are waves of radiation. Radiation is…
In every country in the world there are old sayings that give good advice. These sayings are called proverbs. Most proverbs are so old that no one knows when they were first said. Some proverbs…
Mammals are everywhere. Polar bears, musk oxen, walruses, and reindeer live in some of the coldest parts of the world. Camels and kangaroo rats live in some of the warmest places. Little pikas and…
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