We largely intelligent humans just don't know how much we really don't know about what there is to know about what we don't know!!!!
" A new series of mysterious signals, known as Fast Radio Bursts (FRBs), has again got astronomers scratching their heads and wondering if, maybe, we're picking up alien messages".
* Scientists are trying to work out what is causing Fast Radio Bursts (FRBs)
* The strange signals occur for a few milliseconds and come from nowhere
* The first was detected in 2007, but only a handful have been seen since
* In April the latest discovery was made, but still the mystery persists
*Explanations range from colliding neutron stars to alien signals
FRBs are radio emissions that appear temporarily and randomly, making them not only hard to find, but also hard to study. The mystery stems from the fact it is not known what could produce such a short and sharp burst. This has led some to speculate they could be anything from stars colliding to artificially created messages.
Read more: http://www.dailymail.co.uk/sciencetech/article-2630615/Are-mystery-radio-bursts-messages-ALIENS-Freak-frequency-outside-Milky-Way-baffles-astronomers.html