Teddy Waskawich, age 9, of Niagara Falls, Ont., Canada, for his question:

WILL THERE BE ANOTHER ICE AGE?

Some experts suspect that another ice age is on the way, and it may arrive quite soon. Other experts suspect that there is no ice age in sight, and in fact the world may expect a long spell of warmer weather than we now have. But no true expert knows the answer for sure. There are many signs that the world's weather may be changing. But nobody in the know is certain whether we can expect things to get warmer or a lot colder.    

For more than 100 years, the ice ages have mystified the scientists. Maybe they were caused by changes in the sun or by changes in the earth. Maybe they were caused when the solar system moved into a different part of the Milky Way. But since they happened many times in the past, most likely they will happen again. However, nobody can say for sure when the next ice age will arrive.