For nearly six decades, the Arecibo Observatory in Puerto Rico stood as a monument to human curiosity, exploration, and technological brilliance. Once the world’s largest radio telescope, Arecibo ...

On November 16, 1974, humans sent their first message to the stars in an attempt to contact extraterrestrials. They did this using what was then the largest radio telescope in the world, located at ...

A crowd-sourced search for alien intelligence called SETI@Home is in its final stages, analyzing 100 radio signals of interest using the world's largest radio telescope.

The Arecibo Observatory has been the world's largest single-aperture telescope for more than 50 years. But decreasing funding for its mission could result in its retirement and destruction in the near ...

Add Yahoo as a preferred source to see more of our stories on Google. One of the largest searches for alien intelligence in history is nearing completion, thanks to the help of more than 2 million ...

Five years after the collapse of the Arecibo Observatory telescope — the world’s largest single-dish radio telescope until 2016, when China completed a larger one — space physicist Qihou Zhou is ...

In her last days in office, Gov. Wanda Vázquez Garced signed an executive order committing Puerto Rico to reconstruct the Arecibo radio observatory — a telescope Cornell managed for 42 years. The ...

Astronomers compare losing the observatory in Puerto Rico to losing a big brother. It was once the world's largest single-dish radio telescope. Updated on Dec. 4 at 11:30 a.m. ET The Arecibo ...

While the scientific community grapples with the loss of the Arecibo radio telescope, astronomers who recently revived a long-dormant radio telescope array in Argentina hope it can help modestly ...