Are There Aliens in Space?

Explores the mystery of whether there are aliens in space. This book investigates how scientists observe signs of life on different planets and in other parts of the galaxy, and what alien life might look like. Vivid images and a helpful diagram will aid in comprehension. Additional features include a table of contents, sidebars, critical thinking questions, Fast Facts, an activity for further learning, a phonetic glossary, an index, and sources for further research.