Because the one scientist was using feet, and the other scientist was using meters, in their calculations.
Beagle 2
The first probe to land on Mars was called, the Hubble space craft.
The probe launched on November 26, 2011 is called the Mars Science Laboratory, and includes a new larger rover called Curiosity. The probe will arrive at Mars in August 2012.
The Russian space probe Mars 2 went to space in the year of 1973.
No, a probe is a robot, so it's not really living.
1971
Mars
The US landed the Viking probe.
There were several crash-landings of Mars missions.
NO.
First ever satellite to land on the planet Mars was a Russian probe called Mars 2. Albeit it did not land but crashed. The first successful probe to land on Mars was Mars 3 sent by the Russians, however the probe was operational for 15 minutes after landing on Mars. The first American probe to land on Mars was the Viking 1 on the 20th of July 1976.
curiosity