When the European Space Agency (ESA) successfully landed their first lander on the Philae comet last November, they had no idea what to expect. But it was surmised that at some point, it was a comet that brought life to the planet Earth, according to the Guardian.

The features of the comet are what have scientists excited to announce that here is sufficient evidence to surmise that the comet has, or has had, life on it.

The surface was encrusted with a rich black crust and icy lakes that could indicate that life was either present, or is present on the comet. This life is currently assumed to be that of microorganisms.

In theory, there was a comet that once struck Earth, and it carried similar microorganisms in it. If that theory were proved to be true, then the microorganisms could have been set loose on a planet that could sustain its life, thereby leading to the first life on earth and the eventual evolution of multiple living organisms in a biological atmospheric dome that led to our current existence.

The comet's official name (not Philae, which is the name of the lander) is 67P/Churyumov-Gerasimenko and the features inherent of the rich black crust suggest the thriving atmosphere of alien life.

The Rosetta, which is the European spacecraft that's orbiting the comet, has also picked up clusters of organic material that resemble viral particles. This lends more credence to the theory that life is indeed present on the comet and brings a new focus to the scientists' research.

The lander and the orbiting spacecraft are not equipped to search for direct evidence for life on the planet, which was the result of a court ruling that did not allow for the measure.

The mission itself has been in the planning stages for over 15 years, and at the core of the mission is professor Chandra Wickramasinghe, who is an astronomer and astrobiologist.

"Five hundred years ago it was a struggle to have people accept that the Earth was not the centre of the universe," Wickramasinghe said. "After that revolution our thinking has remained Earth-centred in relation to life and biology. It's deeply ingrained in our scientific culture and it will take a lot of evidence to kick it over."

Another article on the Guardian features people that directly refute the evidence Wickramasinghe said is proof of the discovery.

Stuart Clark wrote the article and claims, "The evidence for any life on Philae's comet is flimsy at best. Even Wickramasinghe's own colleague fell short of agreeing with him outright."

See the video tutorial below of Wickramasinghe's findings and subsequent theory.