Radio signals unlikely to be extragalatic aliens saying 'hi'

ASTRONOMERS HAVE DETECTED ultra-brief repeating energy bursts from deep space for only the second time in history, with some suggesting they could be evidence of advanced alien life. Two researchers shared their views with China Daily writer Zhang Zhouxiang:

Shi Hao, a researcher of space technology

Even if there is the possibility an extraterrestrial civilization sent the fast radio bursts (FRB), the distance to us is beyond the reach of any technology we can image.