
NASA's Perseverance drilled into the surface ofMarsbut failed in its initial attempt tocollectrocksamples that would be picked up by future missions for analysis by scientists on Earth.
The USspaceagency published images Friday of a small mound with a hole in its center next to therover-- the first ever dug into the Red Planet by a robot.
But data sent to Earth by theroverafter its first attempt tocollecta sample and seal it in a tube indicated norockhad been gathered.
"While this is not the 'hole-in-one' we hoped for, there is always risk with breaking new ground," said Thomas Zurbuchen, associate administrator forNASA's science mission directorate, in a statement.
"I'm confident we have the right team working this, and we will persevere toward a solution to ensure future success."
The drill hole is the first step of asampling processthat is expected to take about 11 days, with the aim of looking for signs of ancient microbiallifethat may have been preserved in ancient lakebed deposits.
Scientists also hope to better understand Martian geology.
The mission took off from Florida a little over a year ago and Perseverance, which is the size of a large family car, landed on February 18 in the Jezero Crater.
Scientists believe the crater contained a deep lake 3.5 billion years ago, where the conditions may have been able to support extraterrestriallife.
NASAplans a mission to bring around 30 samples back to Earth in the 2030s, to be analysed by instruments that are much more sophisticated than those that can be brought toMarsat present.