2 months
Radio waves travel at the speed of light. When the Spirit rover landed on Mars, signals were able to be sent from the Earth to Mars in 9 minutes 30 seconds. Unfortunately, the rover became stuck and hasn't sent a signal to Earth since March 22, 2010.
In theory, a Mars Rover could be any size desired. However, there are limits to the size and mass of objects launched from Earth and designed to be hard-landed on the surface. The original Mars rover, Pathfinder, was about 2 feet long. The two Mars rovers currently active, Opportunity and Spirit, are about 5 feet tall, and 6 feet long and wide. On Earth, each would weigh about 385 pounds, but on Mars they weigh less than 100.
Curiosity, NASA's Mars rover, was launched on November 26, 2011, and it landed on Mars on August 6, 2012. The journey from Earth to Mars took approximately 253 days for the rover to reach its destination and successfully land in the Gale Crater.
3 billion years ago
The earth and the sun always form a line. They are the end points of that line and therefore are always lined up.
Probably a while because of the distance of Mars form the earth and how long it takes for radio waves and data to travel through space and be picked up by satellites.
eight month
The 2004 Land-Rover Range-Rover is 16 ft. 3 in. (195 in.) long.
The 2006 Land-Rover Range-Rover is 16 ft. 3.7 in. (195.7 in.) long.
The 2005 Land-Rover Range-Rover is 16 ft. 3 in. (195 in.) long.
The 2014 Land-Rover Range-Rover is 16 ft. 4.8 in. (196.8 in.) long.
The 2009 Land-Rover Range-Rover is 16 ft. 3.8 in. (195.8 in.) long.
The 2001 Land-Rover Range-Rover is 15 ft. 5.5 in. (185.5 in.) long.
The 2010 Land-Rover Range-Rover is 16 ft. 3.8 in. (195.8 in.) long.
The 2013 Land-Rover Range-Rover is 16 ft. 4.8 in. (196.8 in.) long.
The 2012 Land-Rover Range-Rover is 16 ft. 3.7 in. (195.7 in.) long.
The 2011 Land-Rover Range-Rover is 16 ft. 3.8 in. (195.8 in.) long.