A 4-billion-year-old meteorite from Mars did not show any signs of life, according to The Guardian newspaper. That said, the 4-pound rock found in Antarctica in 1984 that presumably broke off of Mars’ surface billions of years ago does have compounds that could lead to life.
More samples should be on their way if NASA’s Perseverance Rover mission on Mars can assist with the return of Martian samples back here to Earth for additional study. So there is still hope that we will find more interesting results down the road.
Extra: The origin (now debunked) story on this rock from a NASA research team of scientists at the Johnson Space Center, Houston, TX, and at Stanford University, Palo Alto, CA, was titled “Meteorite Yields Evidence of Primitive Life on Early Mars.”