Becoming Human Part 3: Last Human Standing, examines the fate of the last of the Neanderthals during the Ice Age. The question of "How did modern humans take over the world?", is explored. [01:20:00]

An interactive and comprehensive site that tracks bioterrorism from its beginnings to modern-day threats. Includes a global guide to bioweapons, possible defenses against bioterrorism, and an interactive tutorial on the making of viral vaccines.

PBS offers a look into the brains of birds. Examine each part of the brain and its function. Click an drag the brain to see a 3-D view.

In this interactive activity from NOVA Online, learn about a type of exploding star a Type II supernova that is so large it has a mass 10 times greater than the mass of our Sun.

In this interactive activity from NOVA Online, learn about a type of exploding star - a Type Ia supernova - that is so bright that astronomers can measure the distance to the galaxy in which it resides, and even learn which elements make up the star.

PBS site takes a look into a mysterious phenomena as to why and how certain sand dunes produce mysterious noises. Contains a link to watch a broadcast segment of an expedition into the desert as well as a recipe for noisy sands.

This activity is an introduction to the branch of science called dendrochronology. Discover what this science tells us about the past and see if you can create a tree ring timeline by matching up band patterns from several different trees.

Trace the development of a type of coral reef known as an atoll. A series of animations show you how an atoll can develop from a volcanic island.

In 1954, an Egyptian archeologist discovered an immense, beautifully crafted ship buried in pieces right beside the Great Pyramid of Khufu. Now fully reassembled, this extraordinary royal craft, one of the oldest planked vessels in the world, has revolutionized our understanding of ancient Egyptian shipbuilding and continues to astonish visitors to the Giza Plateau. In this series of pictures, take a close look at this 4,600-year-old ship of state.

Animations of the different phases of cancer, make this a great resource for understanding the development of this disease.

Think like an engineer and build an aqueduct in this interactive activity from the NOVA: "Secrets of Lost Empires: Roman Bath" Web site.

This 2 hour special on the Human Genome Project is offered by NOVA in 16 segments. It can be viewed with both quicktime and realvideo. Each video is accompanied by a brief description.

Cracking the Maya Code traces the work of scholars, over 200 years, as they attempt to decipher the Maya hieroglyphics. [54:00]

This PBS Nova site lists a table of contents on subjects involving the Crocodile. How did they outlive the dinosaurs? What makes them tick? What are the different types of crocodiles?

The basic difference between a code and cipher is explained briefly. You can try to crack a simple cipher at this location.

This document from NOVA: "Into the Abyss" describes the physical and behavioral traits of some of the least-known and most unlikely creatures on Earth.

Many species that have been introduced for the purpose of dealing with a problem such as erosion or a rat epidemic, instead become invasive. How can these invasive species be eradicated? Eminent ecologist Dan Simberloff explains some of the strategies that can be used to eliminate invasive species.

Explore the four levels of impact that invasive species can have. Several different invasive species are featured in this overview of the impact an invasive species can have.

PBS offers a rare opportunity to explore the glaciers on France's Mt. Blanc in this engaging interactive site. Fun activities for students include following the process a snowflake takes to become a glacier.

This simulation will give you the chance to be an archaeologist and do some field research on Neanderthal artifacts. Dig up the bones and then interpret the evidence.