planning

Describes the research done between 1999 and 2002 by a group of scientists who replicated conditions on Mars to better understand impediments posed by the planet's climate on research and exploration.

Recounts the efforts of the Mars Society to begin the virtual exploration of Mars through a series of unique missions, using habitat modules, space suits, and next-generation exploration equipment to replicate and study the real-life challenges of exploring the Red Planet.

Offers opposing perspectives on the usefulness of the U.S. census, how accurately it represents the country's population, specifically regarding counts of college students, minorities, and same-sex couples, and possible reforms.

Focuses on, rebuilding the World Trade Center site, and offers a variety of perspectives, eyewitness accounts, governmental views, scientific analysis, newspaper and magazine accounts, and may more to illuminate the issue.