Carnegie Institution for Science

Solar system ice: Source of Earth's water

Scientists have long believed that comets and, or a type of very primitive meteorite called carbonaceous chondrites were the sources of early Earth's volatile elements—which include hydrogen, nitrogen, and carbon—and ...

dateJul 12, 2012 in Space Exploration
shares0 comments 32

Organic carbon from Mars, but not biological

( -- Molecules containing large chains of carbon and hydrogen--the building blocks of all life on Earth--have been the targets of missions to Mars from Viking to the present day. While these molecules have previously ...

dateMay 24, 2012 in Space Exploration
shares0 comments 2