Astrobiologist Nathalie Cabrol, who has been researching the "red planet" for years, was emphatic in pointing out that "in 20 years of studying Mars, this is the strangest rock I've seen in my life."
Likewise, the expert stressed that "I can't wait to have a microscopic image of it."
Other users of social networks joined the debate and thought that it could be a fish vertebra, fish fossils, and even the skeleton of a prehistoric creature.
It should be noted that Curiosity is a rover that is the size of an ordinary vehicle, and that in recent times it has been exploring the Gale crater on Mars, as part of NASA's Mars Science Laboratory mission.