Alien Signals: The Search for Intelligent Life

By Dr. Leo Lexicon

In 1977, a radio telescope recorded seventy-two seconds of an unexplained signal. Decades later, its source remains unknown.

Alien Signals: The Search for Intelligent Life follows the real search for other civilizations through discoveries, false alarms and mysteries that remain unsolved. Written for curious pre-teens and teens, it brings the people and instruments behind the science into view.

Meet astronomers who mistook markings on Mars for canals, the scientists who found planets around other stars, and the radio-telescope teams investigating signals hidden in cosmic noise. Follow the famous Wow signal, explore the Fermi paradox and the Great Filter, and examine the evidence behind UFO and UAP reports.

The story also follows humanity's attempts to send messages into space. Find out how the Arecibo message used numbers to make a picture, how researchers would check a possible alien transmission, and why deciding whether to reply could become a worldwide debate.

With 42 illustrations and diagrams, fourteen chapters and sources for further reading, this illustrated science book connects astronomy, exoplanets, astrobiology and SETI, the search for extraterrestrial intelligence, through the stories of people trying to find answers.

Part of the Cosmic Mysteries series by Dr. Leo Lexicon. For readers ages 10-17 who enjoy space, scientific mysteries and the possibility of life beyond Earth.

• Format: Paperback
• Language: English
• ISBN: B0HMVLTBGQ
• ISBN13: 9798162086246
• Release Date: October 2026
• Publisher: Independently Published
• Length: 126 Pages
• Weight: 0.39 lbs.
• Dimensions: 0.3" x 6.0" x 9.0"