There have been seven attempts at sending rovers to Mars of which four landed successfully.
As of November 2016 there are two operational Mars rovers: Opportunity and Curiosity.
THEY WERE SENT TO MARS SO THAT WE CAN DISCOVER MANY NEW THINGS ON MARS!!!
4 rovers :- Sojourner Opportunity Spirit Curiosity.
No one has sent 15 rovers to Mars
Mars rovers were made sometime in the 1970's
There are two Mars rovers, named Spirit and Opportunity. There's obviously "Curiosity" now too. In fact Spirit doesn't work anymore, so there are still two Mars rovers working.
So far, Nasa has successfully acquired four Mars rovers: the Mars Pathfinder, Sojourner, Opportunity, and the Spirit. These were managed by the Jet Propulsion Laboratory and the Mars Science Laboratory.
All of their Mars Rovers have wheels.
As of 2021, there are several active Mars rovers, such as Perseverance and Curiosity. In addition to Mars rovers, there are other robotic rovers deployed on celestial bodies like the Moon and other planets. The exact number of rovers in operation worldwide varies as missions launch and conclude.
the two rovers are:- Spirit and Opportunity.
rovering mars
They are taken there, by spacecraft.