Yes, there are 44 missions.
So far, the United States has been the only country to send probes to Mars.
yes
yes
im not sure
yes
Mars Probes was created in 2002.
Mars Probes has 315 pages.
Space probes are still in use with several on space missions at the present time and in the future. . The MSL Curiosity and Maven probes are currently on missions. NASA has both the Insight, which is set to launch in 2016 and the Mars Sample Return Mission that will be ready for launch in 2024.
There hasn't but in the future maybe.
Many have been sent, although only around a third of missions actually got there. However, the number that were sent is around 42, with several planned by various agencies for 2010-2011 and beyond.16 probes have gone to Mars.
4 space probes
more than 40 probes