Finding Life in the Universe

We're not alone in the universe; Earth is just one tiny planet in the vast cosmos. Biologists are searching the skies for signs of life, from tiny microbes to supersmart sci-fi societies, discovering what else is out there lies just beyond the stars. Space is full of mysteries--and we're here to solve them. Includes 21st Century Skills and Content, sidebars, activity, table of contents, index, and glossary.