However, little has been known about where the space rock came from and what it was made of.
Jupiter may have stopped migrating toward the Sun because of Saturns gravitational field.
The element was buried deep within Earth, way before the dinosaur-killing impact.
An illustration of the large asteroid collision with Earth.Mark Garlick/Science Photo Library
Inner solar system asteroids contain less ruthenium isotopes.
Thats probably because, when the planets were still forming, the inner solar system likely had higher temperatures.
News from the future, delivered to your present.
