What If ET Called, But Nobody Heard?

Welcome to the awesome world of science, brought to you by Discovery. What if an advanced alien civilization saw our planet across the interstellar expanse and switched on their powerful radio transmitters to send a "hello neighbor!" message... Read More - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - At Discovery Communications, we value your privacy. If you would like to be removed from future communications like this, please click here. Privacy Policy Discovery Communications, LLC One Discovery Place Silver Spring, MD 20910 © Copyright 2015 Discovery Communications, LLC