What is the Arecibo Message? - Universe Today
China invests in the hunt for aliens with world's largest radio telescope | TechCrunch
Crop Circles: Windows of Perception by Lucy Pringle | Forty-Five
Germans Flock to Mysterious Crop Circle
Crop Circles: A Not-So-Convincing Case | Skeptical Inquirer
Aliens and the Arecibo Message | SiOWfa12: Science in Our World
Canine crop circle pops up near Jodrell Bank | Knutsford Guardian
Experts terrifying fear over what could come back after Arecibo message sent to aliens - Mirror Online
Crop Circles: A Not-So-Convincing Case | Skeptical Inquirer
Radio and radar astronomy | Definition, Measurements, & Facts | Britannica
100M Radio Telescope Effelsberg: The first 50 years - Issuu
LISTSERV - DAILY-ASTRONOMER Archives - LISTS.MAINE.EDU
Chilbolton Radio Telescope 2, Hampshire | 20th August 2001 | Wheat 35mm Neg - Temporary Temples
Arecibo Observatory radio telescope collapses in Puerto Rico
File:Mount Pleasant Radio Telescope (crop).jpg - Wikimedia Commons
Violent Drug Cartels Stifle Mexican Science - Scientific American
China Says It May Have Detected Signals From Aliens | Time
More than 500 orders passed through EU SatCom Market - Marlink News
Giant Metrewave Radio Telescope Archives - Public Website
Chilbolton Observatory Radio Telescope, World War Two Airfield, Crop Circle Formations - YouTube
Scientists looking for aliens investigate radio beam 'from nearby star' | Space | The Guardian
It's the 25th anniversary of Earth's first attempt to phone E.T. | Cornell Chronicle
File:Chilbolton crop circle.svg - Wikipedia
With New Study, NASA Seeks the Science behind UFOs - Scientific American
100 Places Podcast #4: Radio telescopes & interferometry | Historic England
