NASA's Curiosity rover has used a drill carried at the end of its robotic arm to bore into a flat, veiny rock on Mars and collect a sample from its interior, the U.S. space agency said Saturday.

This is the first time any robot has drilled into a rock to collect a sample on Mars.

The fresh hole, about 1.6 centimeters wide and 6.4 centimeters deep in a patch of fine-grained sedimentary bedrock, can be seen in images and other data Curiosity beamed to Earth Saturday.

The rock is believed to hold evidence about long-gone wet environments. In pursuit of that evidence, the rover will use its laboratory instruments to analyze rock powder collected by the drill.

"The most advanced planetary robot ever designed now is a fully operating analytical laboratory on Mars," said John Grunsfeld, NASA associate administrator for the agency's Science Mission Directorate. "This is the biggest milestone accomplishment for the Curiosity team since the sky-crane landing last August, another proud day for America."

For the next several days, ground controllers will command the rover's arm to carry out a series of steps to process the sample, ultimately delivering portions to the instruments inside.

Curiosity, loaded with the most-sophisticated instruments ever used to explore another world, touched down on the Red Planet on Aug. 6. It will use its 10 instruments to investigate whether conditions have been favorable for microbial life and for preserving clues in the rocks about possible past life.