Mars
The exploration of mars is the study by spacecraft. Probes sent from earth beginning in the late 20th century have yielded a dramatic increase in knowledge about the martian system.
August 19,2012
After nasa sent a spacecraft to succeed "Curiosity" to land on mars on august 6, 2012 the overall survey result are as satisfactory. Scientists have knowledge about the geology, the physical, and chemical properties of the planet increases. However, scientists still don't stop wondering and asking qeustion. Continue to accelerate the development of toolss and push the new project on mars. The project mars 2020 of nasa to crammed with modern scientific instruments.