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Queens of the sea

Today's queens of the sea are giant merchant ships that carry trade goods all over the world. Compared to these giants, the ships of the ancient Phoenician traders would look like tiny rowboats! The...

The world ocean

Look at a globe from the top or the bottom. You will see that all the oceans are really joined to one another and form a single body of water. More than three-quarters of our world is covered with...

Natural gardens

Natural gardens are often called wild gardens because they look just like an ordinary woodland or meadow. But most of the plants in a natural garden are care­fully planted by people. A natural...

What leaves do

Leaves don't seem to do anything at all. But if you could become tiny enough to peek inside a leaf---you would have a surprise! Sunlight comes into a leaf through the leaf's skin, which is clear...