This media-rich essay from NOVA Online describes the challenges involved in installing a warning system for tsunamis in the Indian Ocean.

This resource focuses on the December 26th Indian Ocean tsunami. It explains the anatomy of the Indian Ocean tsunami, as well as what is being done to prepare for future tsunamis. In addition, it shows potential hot spots for future tsunamis.

This documentary film [02:00:00] examines Darwin's insights and discusses how new breakthroughs in science are unlocking answers to riddles that Darwin couldn't answer. (29 December 2009)

PBS discusses how floods can be beneficial to farmers as it helps increase the harvest.

Articles and a slide show giving many different scenarios about the death of Manfred von Richthofen, the German World War I pilot known as the Red Baron.

While all clouds share the same basic composition, there's a wide variety of shapes and sizes. To understand these formations in greater detail we must first categorize their many variations. [3:35]

Examine what it is that gives metal its special characteristics and how metal behaves under the stress of heat and outside forces. An engaging interactive feature is offered to here to illustrate this concept.

What's in a wolf's howl -- a calling card, a warning, or an invitation? Hear the call of the wild, find out how wolves are making a comeback, and discover the ancient connection between dogs and wolves in this feature exhibit.

Do you have what it takes to stop a forest fire? In this simulation you'll have to decide where to put a fire break and a backfire in order to save a house that's about to be engulfed in flames.

There are descriptions of 8 different prenatal tests that can be used to track the health and development of a baby. The risks of the tests are also included.

A companion site to Nova's film that examines "human populations and environments." Find some fascinating facts in the interactive slide shows "Human Numbers Through Time," and "Global Trends Quiz."

A video investigating the hunt for the gene that causes autism. Learn how a parents crusade to help their child led to scientist finding a stretch of similar genes that may help solve the mystery about autism. [12:51]

With this video resource, viewers follow a research biologist into the swamp to find out why leeches have such a bad reputation, and what role they play in today's environment and medical field. [11:01]

Compare and contrast different types of lightning bolts. A substantial amount of information is provided here including pictures with descriptions for each type of lightning bolt. NOTE: The interactive is no longer available; Click on Printable Version for the information you need.

Students practice a procedural skill -- knot tying -- to investigate if and in what way sleep affects learning and memory in relation to a learning a procedural skill. Sleeping is a behavior that is natural and essential for our health and well-being. In fact, it is a biological necessity -- we would die without it. Still, sleep is not yet well understood. It is known that sleep is not a time for all body systems to shut down and rest. Some brain activity actually elevates during sleep, and some hormone secretions increase too. Studies show that sleep affects energy, reaction rate, coordination, concentration, and focus. Lack of sleep often results in costly and even deadly consequences.

This resource provides educators with information, lesson plans, current news, and other topics that assist with teaching.