All the essential ingredients to make the DNA and RNA underpinning life on Earth have been discovered in samples collected from the asteroid Ryugu, scientists said Monday.
The discovery comes after these building blocks of life were detected on another asteroid called Bennu, suggesting they are abundant throughout the solar system.
One longstanding theory is that life first began on Earth when asteroids carrying fundamental elements crashed into our planet long ago.
The asteroids that hurtle through our solar system give scientists a rare chance to study this possibility.
In 2014, the Japanese spacecraft Hayabusa-2 blasted off on a 300-million-kilometer...
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