(WUSA) -- On Monday, a news conference was held to give an update on NASA Mars rover Curiosity's instruments and how they're used to investigate sandy soil. The instruments are testing for organic compounds, which could indicate carbon-based life.
NASA officials say that the rover has found "a complex chemistry within the Martian soil." Samples of the soil contained water, sulfur and chlorine-containing substances, but no definitive signs of life.
According to NASA, Curiosity is the first Mars rover with the ability to scoop soil into analytical instruments. In this case, the samples came from "Rocknest," a drift of windblown dust and sand.
For more information about Curiosity and the mission, go to: http://www.nasa.gov/mars