"Mars and Earth share many features. Maybe one day, cities full of people will be another thing they share! But how similar are the planets, really? Which features aid in supporting human life, and which will make colonization more difficult? Find out what kinds of preparations are underway to make living on Mars possible. Full-color photos give readers a look at this future vacation destination. 21st Century sidebars discuss technological advancements,...

"Mars is millions of miles away from where you stand. The race to get from here to there has been going on for decades. With every passing day, that journey through the stars has changed from science fiction to a scientific factual possibility. New inventions have led the way toward space exploration. What can we take with us into the future, and what will we need to leave behind on Earth? Full-color photos show the new advancements that will get...

"From millions of miles away, Mars looks like a bright red star. But it's more than just a spot in the sky! Science has given us many lessons on what else exists in our solar system. Rovers, orbiters, and other spacecraft have sent back information that scientists use to bring us one step closer to landing on Mars ourselves. Full-color photos bring to life the exciting discoveries scientists have uncovered. 21st Century sidebars discuss technological...