Scientists describe emergence, a science that studies how complex patterns and behaviors arise from the actions of individual units acting independently. This NOVA scienceNOW segment: states that ...

This video segment adapted from NOVA scienceNOW examines the threat of a virus being spread from birds to humans, and then from humans to humans. It details the mechanisms viruses use to infect cells, ...

Scientists describe how forces in the atomic nucleus work to keep the atom stable. They then explain how researchers make new elements and discuss why large, man-made elements—those beyond atomic ...

Dr. Pardis Sabeti is a professor of genetics and an infectious disease specialist at Harvard University. She developed an effective way to track the spread of genes in a population, providing insight ...

See a growth curve for T. rex from birth to 28 years old, the longest any T. rex has been known to live. (Flash plug-in required.) (Grades 3-5, 6-8, 9-12) ...

An interdisciplinary collaboration between a paleontologist, an evolutionary anthropologist, and a primate anthropologist sheds new light on how and where primates got their evolutionary start. This ...

Survey students' opinions about whether we are alone in the universe. Is there life elsewhere in the universe? Is there intelligent life? Have students discuss these questions with a partner or in ...

Many of your students have never experienced life without computers. Help them develop a clearer understanding of their personal, and society's, dependence on computers. Have them brainstorm a list of ...

Scientists describe the risky, high-stakes repairs on the Hubble Space Telescope scheduled for fall 2008. This NOVA scienceNOW segment: recounts how the Hubble Space Telescope has revolutionized ...

Record information about sleep habits. Starting the week before you view the program, have students record four kinds of their own sleep-related data—hours of sleep, general mood, physical energy, and ...

Determine an organism's age by counting annual growth rings. Paleontologist Dr. Greg Erickson found that he could determine the age of T. rex by counting the growth rings in its rib bones. Many plants ...

Scientists have gained new insights into the lifespan of Tyrannosaurus rex (T. rex) and how T. rex grew to be so large. reports that scientists typically find the age of dinosaurs and many other ...