If alien signals have already reached Earth, why haven't we seen them?

For decades, scientists have searched the skies for signs of extraterrestrial technology. A study from EPFL asks a sharp ...

Could alien signals have already reached Earth undetected?

Astronomers have searched the skies for signs of extraterrestrial technology for decades. These searchers since 1960 have ...
Scientific American

Could aliens in another galaxy see dinosaurs on Earth?

How big would a telescope need to be to see Earth’s dinosaurs from 66 million light-years away? Think big—and then think ...

Did alien signals reach Earth? If they did why have they gone undetected

For more than six decades, astronomers have listened for possible signals from extraterrestrial civilisations, with no confirmed detection to date. A .
The Daily Galaxy on MSN

Alien signals could have already reached us: Why haven’t we detected them?

For decades, scientists have been actively searching for signs of extraterrestrial life. Fromradio waves to laser flashes and ...