https://www.space.com/life-earth-messenger-comets-asteroid-samples-ryugu-hayabusa2
A detailed investigation of asteroid Ryugu
samples has provided further evidence that
the organic molecules which gave rise to
life to our planet were brought here by
ancient comets.
...
The team of scientists behind the new
developments in the quest to find life's
origins found 5 to 20-micrometer-wide "melt
splashes" created when cometary dust in
particular pelted the surface of Ryugu. And
within these melt splashes, the researchers
found small carbonaceous materials similar
to primitive organic matter.
"This organic matter might be the small seeds
of life once delivered from space to Earth,"
team member and Tohoku University Graduate
School of Science assistant professor Megumi
Matsumoto said in a statement.
...
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