marklivedaily.com
Very powerful laser 'porch light' could let aliens and other living beings know where Earth located - MARK LIVE DAILY
An MIT researcher claims a laser space beacon detectable up to 20,000 light years away is feasible — essentially acting as a porch light for extraterrestrial life. James Clark’s study posits that focusing a one- to two-megawatt laser through a 30- to 45-meter telescope and aiming it into …