As earth whirls along on its endless journey through space, it has a companion that is always beside it— the moon. The moon is a small planet. It is only about one-fourth as big as earth. The moon…
Is a pool full of ice water warm enough for swimming? Not for you! But for a penguin, it might be just right. You and the penguin have different ideas about how \”warm” the water is. You can easily…
A swimming fish seems to glide through the water without making a sound. But it doesn’t swim as quietly as you think! Divers swimming underwater hear a loud crack when a large fish flips its tail and…
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