Showing results by narrator "Chris Lutkin" in Science & Engineering

When we use chemical fertilizers, we injure the microbial life that sustains plants and then become increasingly dependent on an arsenal of toxic substances. Teaming with Microbes offers an alternative to this vicious circle and details how to garden in a way that strengthens, rather than destroys, the soil food web. You’ll discover that healthy soil is teeming with life - not just earthworms and insects, but a staggering multitude of bacteria, fungi, and other microorganisms.

Most gardeners realize that plants need to be fed but know little to nothing about the nature of the nutrients involved or how they get into plants. Teaming with Nutrients explains how nutrients move into plants and what both macro-nutrients and micro-nutrients do once inside. It shows organic gardeners how to provide these essentials.

Imagine a force that can toss boats around like toys, wash away bridges, and create waves as high as 18 feet. With fierce winds and torrential rains, hurricanes can do all of these things. They can cause tremendous damage and even change the shape of a shoreline. For centuries people did not know when a hurricane was coming. But now we have new methods to predict when and where these storms will occur. Young viewers will learn how hurricanes are formed, how they are named and classified, and what to do if a dangerous storm is on the way.

Why is there winter in the Southern Hemisphere at the same time there is summer in the Northern Hemisphere? Here is an explanation of how the position of Earth in relation to the sun causes seasons and the wonders that come with each one of them. Summer. Autumn. Winter. Spring comes again. Year after year, the seasons repeat themselves.

Did you know the moon is a satellite? In fact, the moon is the Earth's only natural satellite. Children will learn about lunar phases, eclipses, lunar exploration and the moon's effect on the Earth.