PBS
Nova: Do Aliens Exist in the Milky Way?
Does alien life exist? Explore the arguments both pro and con. Make your own opinion known by participating in an online poll and then find out what the majority believe.
Science Education Resource Center at Carleton College
Serc: Biofilms: Online Manual
This on-line collection of exercises can be conducted to illustrate the formation and properties of microbial biofilms. Activities include: A Biofilm Primer, An Interesting Paradox, Build a Biofilm Reactor, Bring 'em Back Alive, Buccal...
Science Education Resource Center at Carleton College
Serc: Introduction to Exobiology
Featured is a tutorial on exobiology and the origins of life. The tutorial covers the nature of prebiotic Earth, the Miller-Urey experiment, possible sites for the origin of life, the search for extraterrestrial life, politics in...
Wikimedia
Wikipedia: Carl Sagan
This encyclopedia article from Wikipedia provides a brief biography of Carl Sagan, the American astronomer who pioneered exobiology and promoted the Search for Extraterrestrial Intelligence (SETI), and science in general.
National Institute of Educational Technologies and Teacher Training (Spain)
Ministerio De Educacion: La Tierra: Un Planeta Habitado
Find out which factors make life possible on a planet. Learn about the common features and the functions and the diversity of living things, environments, sizes, shapes and means of eating. It contains 19 interactive activities and many...
Other
Mars today.com: Home Page
MarsToday.com provides a collection of sites related to the planet Mars. Not your dad's "Whole Earth Catalog" since it's missing all of the advertising and humor. Latest news, basic planetary facts, and historic missions to Mars.
Nine Planets
The Nine Planets: Titan
This site from The Eight Planets shows that Titan may serve as a model of a highly reduced early Earth atmosphere in which the first stages of organic chemical evolution could take place in the atmosphere.
NASA
Nasa: Nasa's Carl Sagan Fellows to Study Extraterrestrial Worlds
NASA announces the new Carl Sagan Postdoctoral Fellowships in Exoplanet Exploration, created to inspire the next generation of explorers seeking to learn more about planets, and possibly life, around other stars.
PBS
Nova: Signs of Life
Can you find planets that will support life? This activity will give you data for different planets and challenge you to find one that supports life.
PBS
Nova: Alien Evidence
The Nazca desert of Peru has some very unusual designs. There are two explanations that you can investigate, which explain the origin of these lines.