Possibly.
Scientists believe they have found the first evidence of life arriving to Earth from space, which could "completely change our view of biology and evolution".The team, from the University of Sheffield, made the discovery after sending a balloon high into the stratosphere.On its return they found organisms that were too large to have originated from Earth.Professor Milton Wainwright, who led the team, said the results could be revolutionary.
The balloon was launched near Chester and carried microscope studs which were only exposed to the atmosphere when it reached heights of between 22 and 27km from the planet.It later landed safely and intact near Wakefield when scientists discovered they had captured a fragment of biological material, which were unusual due to their size.If life does continue to arrive from space then we have to completely change our view of biology and evolution.In the absence of a mechanism by which large particles like these can be transported to the stratosphere, we can only conclude that the biological entities originated from space.Our conclusion then is that life is continually arriving to Earth from space, life is not restricted to this planet and it almost certainly did not originate here.
http://www.itv.com/news/2013-09-19/evidence-of-life-arriving-from-space-could-revolutionise-biology-and-evolution/
TLDR?
Scientists send balloon up into atmosphere, balloon arrives back with 'life particles' too big to have gotten there from earth, so they reckon it's more than probably came from space, and probably was the first life particles to ever arrive on our planet.
Essentially making us all space children.
It's almost a statistic certainty that we're not alone in the universe. But did we evolve from these particles?
Thoughts.