Surprising fact – the very popular American space agency NASA was originally established to investigate extraterrestrial life and eventually, the research expanded into various space research verticals, adding up various achievements that we all are aware about. But researching on extraterrestrial life still remains as an important topic for NASA and they recently concluded that aliens, or rather extraterrestrial intelligence may have visited Earth earlier.

Since the main goal of NASA was researching on extraterrestrial life, they have progressed quite a lot in the field and have relentlessly tried to identify the possibilities of life on other planets, predicting their visits to our planet, or finding them in their habitat. However, we, as humans can only consider the similar nutritional requirements and nutritional conditions for aliens as well, which has always narrowed down our perspective and chances of finding life on other planet.

But that is not the case for one of the scientists at NASA – Silvano P Colombano who works as a computer scientists at the space agency. In a research paper, Colombano has claimed that aliens might have visited us earlier but we might not be knowing about it till now. Pointing out the versatility of possible life, the researcher scientist suggested that aliens might be very much different from what we are imagining. They might not even be using carbon as an energy source, or as their building block and that’s one thing that can stop us from detecting their existence.

Similarly, there can be differences in physical appearance as well, so in the words of Silvano, “I want to point out the fact that the intelligence we might find and that might choose to find us (if it hasn’t already) might not be at all produced by carbon-based organisms like us”. Broadening the perspective will thereby broaden the research area as well and we might find our friends from other planets soon.