Archeological Dig
In 1971, Dr. Voorhies was walking with his wife. They were on a farm in Nebraska. Dr. Voor...
People love to visit Paris, France. One place they never miss is the Eiffel Tower. It is not easy to miss. It is the tallest building in the city. It was built in 1887. Gustave Eiffel designed it. It was only supposed to stand for twenty years. At first, people thought it was ugly. But gradually people fell in love with it. They wanted it to stay. Over the years, more than two hundred million people have been there. It is made of iron girders. You can take an elevator to the top. This gives you a great view of Paris. You can see everything. On the way down, you can eat at a restaurant in the middle of the tower. The tower has no walls. It is just a lace-like framework.
In 1971, Dr. Voorhies was walking with his wife. They were on a farm in Nebraska. Dr. Voor...
Most people want to be good to the earth. You probably recycle. You put bottles and cans i...
Exercise is important in space. In space, there is no gravity. Everything is weightless. A...