In the mid-1990s, astronomers made history when they began to find planets orbiting stars in the Milky Way. More than eight hundred planets have been found since then, yet none of them is anything like Earth and none could support life. Now, armed with more powerful technology, planet hunters are racing to find a true twin of Earth. Science writer Michael Lemonick has unique access to these exoplaneteers, as they call themselves, and Mirror Earth unveils their passionate quest. Unlike competitors in other races, Geoff Marcy, Bill Borucki, David Charbonneau, Sara Seager, and others actually consult and cooperate with one another. But only one will be the first to find Earth's twin. Mirror Earth tells the story of their competition.

More troubles arise through the various worlds, when the Elders decide something has to happen. A stranger shows up in the prehistoric jungle, and that is the start of new journeys and discoveries. Meanwhile, the attempts to get Gloria a new arm aren't making much progress either. Abilities may come and go, but there will always be some pathways to get out of trouble. Are you ready for dinosaurs, new worlds and a renewed encounter with the Redolans, then step right this way! (Book 5 of the Mirror Earth set.)

Tara, an Indian-American junior at Brierly prep school, feels her world dramatically change when a mirror planet to Earth is discovered and she, in this new era of scientific history, reconsiders her self and possible selves.

In this sequel to 'Mirror Earth', Elisabeth and Roger live happy lives on the other Earth. They are still adjusting, but there are many people around to help them along. Denise, Walter, Jane and Sarah are back on their home Earth. Due to what's called the failure of the time-fluxer project things aren't that great. The scientists go on because they have to. Unfortunately they only have each other to fall back on because Professor Holger has little love left for them. Everyone thinks the troubles with the time-fluxer are over. It's time to think again.

Earth. The future. Researchers have discovered how to detect fluctuations in time and found that there is the possibility for alternate realities. Complicated calculations, big laboratories and big interests are at stake. A group of researchers is dedicated to pursuing the biggest experiment in their lives: to see if there are indeed other worlds like ours. And what will they look like if there is anything like another Earth? Step into the world of Mirror Earth to discover what's out there...

Earth. The future. Researchers have discovered how to detect fluctuations in time and found that there is the possibility for alternate realities. Complicated calculations, big laboratories and big interests are at stake. A group of researchers is dedicated to pursuing the biggest experiment in their lives: to see if there are indeed other worlds like ours. And what will they look like if there is anything like another Earth? Step into the world of Mirror Earth to discover what's out there...