Several international space agencies are actively engaged in robotic as well as human exploration of the moon, including projects from China, Japan, India, Russia, Europe, Germany and the United Kingdom.
On July 20, 1969, Neil Armstrong and Buzz Aldrin made the first human footprints on the moon, and much of the work leading up to that historic walk was done right here in Southern California at NASA's Jet Propulsion Laboratory.
NASA’s next mission to Mars, the Mars Science Laboratory, will be landing with an extremely unusual landing system – a skycrane invented by the mission team specifically to land a large rover in scientifically exciting locations on Mars.
Carbon dioxide (CO2) is an efficient atmospheric greenhouse gas. Fossil fuel combustion, deforestation and other human activities are currently emitting more than 30 billion tons of this gas into atmosphere each year.