No other known object has characteristics similar to EC 002, an ancient meteorite found in an Algerian dune sea last year.
The new discovery adds to a growing pile of evidence that Mars may have been more hospitable to life in the distant past.
This is the first time a complete protein has been discovered on an object from space, if the study's results are confirmed.
The Murchison meteorite, which impacted Australia decades ago, contains astral dust that predates the birth of the Sun.
Extremophiles are models for early life on Earth, and we just discovered that one in particular thrives on material from off-world.
The December 18 fireball created the biggest airburst since the Chelyabinsk meteor of 2013.
"Big Bertha," a lunar rock that was picked up by Apollo 14 astronauts, originated on Earth 4.1 billion years ago, according to a new study.
It was the first time an impact has been captured on film during a total lunar eclipse.
It was the closest miss in recorded history.
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The study provides the best evidence yet as to what happened 66 million years ago when an asteroid smashed into Earth.